Shadowpriest.com has a more comprehensive list but includes hard-mode loot which is, for the most part, unobtainable right away. This list is a “best-in-slot” list of gear from the current craftables, reputation and raid content without the inclusion of hard mode loot, low grade epics or PVP gear. There ARE better drops from hard-mode bosses and if your guild is at that point in their progression you’ll most likely benefit more from the full list found here at Shadowpriest.com, which is where I found the information to begin with – I’m just taking out the hard mode loot, etc. Lists are done with the best choice at the top, then working it’s way down. Gems do not include JC Prismatic Gems.

To determine an items spot on the list, I’m using the same gear point scale as Shadowpriest.com which is:

Spell Hit – 1.31 until capped. Once capped, it becomes 0. Items are listed with hit being capped.
Spellpower – 1
Crit – 0.71
Haste – 0.65
Spirit – 0.21
Intellect – 0.21

Legend:
Information on where the numbers come from can be found here. The totals under each item is their total point value. If a second number is present, that the is point value if you are using the item for its hit rating (thus raising the items value significantly). The gem listed is the recommended gem to use to achieve maximum benefit from the item if the socket bonus is good. Totals listed also include the bonus from the gems and socket bonuses (if taken). If more than one socket is available but only one gem is listed, that gem will be used for all sockets.

Set Bonuses (according to Shadowpriest.com):
2pc T8 = ~110 DPS
4pc T8 = ~124 DPS

So if you’re getting the set bonus, take this information in to consideration to adjust it’s spot on the list.

Gems

Meta – Chaotic Skyflare Diamond (+21 crit, +3% crit damage – Requires at least 2 blue gems)

If the socket bonus is spellpower or crit, the list is factored to get the set bonus with the following gems.
Red – Runed Scarlet Ruby (19 Spellpower)
Yellow – Potent Monarch Topaz (9 Spellpower, 8 Crit)
Blue – Purified Twilight Opal (9 Spellpower, 8 Spirit)

Helm

Conqueror’s Circlet of Sanctification (T8.5 – Thorim, Ulduar 25)
-284.01 + Runed Scarlet Ruby
Valorous Circlet of Sanctification (T8 – Mimiron, Ulduar 10)
-267.3 + Runed Scarlet Ruby
Cowl of Dark Whispers (Yogg-Saron, Ulduar 25)
-257.82 + Purified Twilight Opal
Collar of the Wyrmhunter (Razorscale, Ulduar 25)
-246.74/313.55 + Purified Twilight Opal
Hood of Rationality (Malygos, EoE 25)
-246.51 + Runed Scarlet Ruby
Lifespark Visage (Flame Leviathan, Ulduar 10)
-231.5 + Runed Scarlet Ruby
Gothik’s Cowl (Gothik the Harvester, Naxx 25)
-228.17 + Potent Monarch Topaz
Valorous Circlet of Faith (T7.5 – Kel’Thuzad, Naxx 25)
-224.9 + Potent Monarch Topaz
Enamored Cowl (Heroic Sartharion 2D)
-222.67 + Potent Monarch Topaz
Cowl of Vanity (Grobbulus, Naxx 25)
-220.79 + Runed Scarlet Ruby
Visage Liquification Goggles (Engineering, Crafted)
-213.56 + Potent Monarch Topaz
Heroes Circlet of Faith (T7 – Kel’Thuzad, Naxx 10)
-203.7 + Potent Monarch Topaz
Cowl of Icy Breaths (Hodir, Ulduar 10)
-201.39/279.99 + Runed Scarlet Ruby

EnchantArcanum of Burning Mysteries (Revered Kirin Tor)

Neck

Unblinking Eye (Iron Council, Ulduar 25)
-126.43
Cosmic Lights (Sapphiron, Naxx 25)
-125.9
Wyrmrest Necklace of Power (Malygos, EoE 25 Quest turn-in)
-121.03/192.3 + Runed Scarlet Ruby
Evoker’s Charm (19 Emblem of Conquest)
-118.94
Necklace of the Glittering Chamber (Malygos, EoE 10)
-110.39
Freya’s Choker of Warding (Flame Leviathan, Ulduar 25, +MP5)
-109.01
Chain of the Ancient Wyrm (Malygos, EoE 10 Quest turn-in)
-108.08/147.38 + Runed Scarlet Ruby

Shoulders

Conqueror’s Mantle of Sanctification (T8.5 – Yogg-Saron, Ulduar 25)
-181.96 + Runed Scarlet Ruby
Valorous Mantle of Sanctification (T8 – Thorim, Ulduar 10)
-169.73 + Runed Scarlet Ruby
Mantle of Dissemination (Malygos, EoE 25)
-163.91
Mantle of the Unknowing (Vezax, Ulduar 25)
-162.89 + Runed Scarlet Ruby
Underworld Mantle (Vezax, Ulduar 10)
-161.66
Mantle of Wavering Calm (XT-002, Ulduar 25)
-155.63
Mantle of the Preserver (Auriaya, Ulduar 10)
-152.89
Iceshear Mantle (Trash Mobs, Ulduar 10)
-148.68 + Runed Scarlet Ruby
Mantle of Locusts (Anub’Rekhan, Naxx 25)
-144.61 + Runed Scarlet Ruby
Valorous Mantle of Faith (T7.5 – Loatheb, Naxx 25/60 Emblems of Valor)
-141.47/195.18 + Runed Scarlet Ruby
Mantle of the Corrupted (Grobbulus, Naxx 25)
-135.55/184.02

EnchantGreater Inscription of the Storm (Exalted Sons of Hodir), Master’s Inscription of the Storm (Inscription Only)

Cloak

Pennant Cloak (Heroic Sartharion 2D)
-144.1 + Runed Scarlet Ruby
Asimov’s Drape (Mimiron, Ulduar 25)
-126.43
Deathchill Cloak (Crafted)
-123.98
Drape of the Spellweaver (Trash Mobs, Ulduar 10)
-122.96
Cape of the Unworthy Wizard (Kel’Thuzad, Naxx 25)
-122.93
Shroud of Luminosity (Heigan, Grobbulus, Gothik, Maexxna, Naxx 25)
-120.73
Shawl of Haunted Memories (Yogg-Saron, Ulduar 25)
-119.51
Shroud of the Citadel (Sapphiron, Naxx 10)
-108.79
Shawl of the Old Maid (Grobbulus, Naxx 25)
-108.28

EnchantGreater Speed (+23 Haste), Springy Arachnoweave (+18 spellpower, Engineer Only), Lightweave (chance to proc +250 spellpower for 15 seconds on spellcast, Tailor Only)

Chest

Robes of the Umbral Brute (Kologarn, Ulduar 25)
-254.54 + Runed Scarlet Ruby
Raiments of the Iron Council (Iron Council, Ulduar 25)
-227.48 + Runed Scarlet Ruby
Conqueror’s Raiments of Sanctification (T8.5 – Hodir, Ulduar 25)
-223.66/320.6 + Runed Scarlet Ruby
Valorous Raiments of Sanctification (T8 – Yogg-Saron, Ulduar 10)
-212.01/301.09 + Runed Scarlet Ruby
The Sanctums Flowing Vestments (Heroic Sartharion)
-206.78 + Runed Scarlet Ruby
Vestments of the Piercing Lights (Vezax, Ulduar 10)
-200.99
Digested Silken Robes (Maexxna, Naxx 25)
-200.39
Robes of Mutation (Noth, Naxx 25)
-197.9 + Runed Scarlet Ruby
Raiments of the Corrupted (Auriaya, Ulduar 25)
-192.33/291.89 + Runed Scarlet Ruby
Spellweave Robe (Crafted)
-186.86
Heigan’s Putrid Vestments (Heigan, Naxx 25)
-186.32/250.51 + Runed Scarlet Ruby
Gown of the Spell-Weaver (Malygos, EoE 10)
-179.2/273.52 + Runed Scarlet Ruby

Enchant+10 Stats

Wrist

Unsullied Cuffs (Heroic Sartharion 2D)
-124.42 + Runed Scarlet Ruby
Shackles of the Odalisque (Razorscale, Ulduar 25)
-122.93
Runetouch Handwraps (Iron Council, Ulduar 10)
-116.57
Bands of Impurity (Noth, Naxx 25)
-115.94 + Runed Scarlet Ruby
Bracers of Unleashed Magic (Kologarn, Ulduar 25)
-110.96/158.12
Punctilious Bindings (Faerlina, Naxx 25)
-107.27
Bindings of the Expansive Mind (Razuvious, Naxx 25)
-103.51/140.19
Azure Cloth Bindings (Heroic Violet Hold)
-102.48
Grips of Chaos (Trash Mobs, Ulduar 25)
-93.95/141.11
Resurgent Phantom Bindings (Gothik, Gluth, Naxx 10)
-93.89
Cuffs of Winged Levitation (Eregos, Heroic Oculus)
-93.89
Combustion Bracers (Flame Leviathan, Ulduar 10)
-87.75/129.77

Enchant+30 spellpower, Fur Lining – Spellpower (+67 spellpower, Leatherworking Only)

Gloves

Conqueror’s Handwraps of Sanctification (T8.5 – Mimiron, Ulduar 25)
-184.02 + Runed Scarlet Ruby
Valorous Handwraps of Faith (T7.5 – Heroic Sartharion)
-174.54 + Runed Scarlet Ruby
Valorous Handwraps of Sanctification (T8 – Freya, Ulduar 10)
-171.79 + Runed Scarlet Ruby
Constructor’s Handwraps (Flame Leviathan, Ulduar 25)
-164.33
Handwraps of Plentiful Recovery (Kologarn, Ulduar 25)
-160.18
Handwraps of Resonance (Thorim, Ulduar 10)
-159.65
Touch of the Occult (28 Emblem of Conquest)
-157.05
Heroes Handwraps of Faith (T7 – Sartharion 10)
-154.62 + Runed Scarlet Ruby
Gloves of Token Respect (Faerlina, Naxx 25)
-139.05
Spellweave Gloves (Crafted)
-137.52
Gloves of Glistening Runes (Heroic Nexus)
-135.35

Enchant+28 spellpower, Hyperspeed Accelerators (+340 haste for 10 seconds, 1 min cooldown. Engineer Only), Hand-Mounted Pyro Rocket (Deals 1440-1760 fire damage to target. 1 min cooldown. Engineer Only)

Belt

Cord of the White Dawn (Crafted, Ulduar recipe)
-178.86 + Runed Scarlet Ruby + Potent Monarch Topaz
Leash of Heedless Magic (Malygos, Heroic EoE)
-165.98
Sash of Ancient Power (Crafted, Ulduar recipe)
-164.29/220.62 + Runed Scarlet Ruby
Embrace of the Leviathan (Flame Leviathan, Ulduar 25)
-157.31
Sash of Potent Incantations (28 Emblem of Conquest)
-153.6
Binding of the Dragon Matriarch (Razorscale, Ulduar 10)
-153.31
Conductive Cord (XT-002, Ulduar 10)
-146.05
Belt of False Dignity (Faerlina, Naxx 25)
-142.05
Cincture of Polarity (Thaddius, Naxx 25)
-134.42/190.75
Belt of the Darkspeaker (Vezax, Ulduar 25)
-132.52/205.88 + Runed Scarlet Ruby
Sash of the Servant (Heroic Azjol-Nerub)
-132.36
Sash of Mortal Desire (Faerlina, Naxx 10)
-128.77
Plush Sash of Guzbah (40 Emblem of Heroism)
-100.99/144.22 + Runed Scarlet Ruby

EnchantEternal Belt Buckle + Runed Scarlet Ruby

Legs

Leggings of Profound Darkness (Vezax, Ulduar 25)
-246.36 + Runed Scarlet Ruby + Potent Monarch Topaz
Legwraps of the Master Conjurer (39 Emblem of Conquest)
-231.86 + Runed Scarlet Ruby
Conqueror’s Pants of Sanctification (T8.5 – Freya, Ulduar 25)
-228.54 + Runed Scarlet Ruby
Leggings of Mortal Arrogance (Kel’Thuzad, Naxx 25)
-226.23 + Runed Scarlet Ruby
Valorous Pants of Sanctification (T8 – Hodir, Ulduar 10)
-215.38 + Runed Scarlet Ruby
Leggings of Lost Love (Thorim, Ulduar 25)
-214.72 + Runed Scarlet Ruby
Valorous Pants of Faith (Thaddius, Naxx 25/75 Emblem of Valor)
-207.24 + Runed Scarlet Ruby
Leggings of Unstable Discharge (Thorim, Ulduar 10)
-201.84
Leggings of the Wanton Spellcaster (Malygos, Heroic EoE)
-194.22/301.64
Overload Legwraps (Iron Council, Ulduar 25)
-192.96/299.07
Leggings of Atrophy (Anub’Rekhan, Naxx 25)
-188.34/253.84

EnchantBrilliant Spellthread (+50 spellpower, +20 spirit)

Feet

Spellslinger’s Slippers (Crafted, Ulduar recipe)
-177.45 + Runed Scarlet Ruby
Savior’s Slippers (Crafted, Ulduar recipe)
-171.97 + Runed Scarlet Ruby
Boots of the Servant (Freya, Ulduar 25)
-171.14 + Runed Scarlet Ruby
Sandals of the Ancient Keeper (Auriaya, Ulduar 25)
-160.25
Treads of the Dragon Council (Yogg-Saron, Ulduar 10)
-155.68
Arcanic Tramplers (Malygos, Heroic EoE)
-152.84
Sandals of Rash Temperament (XT-002, Ulduar 25)
-151.36/226.03
Boots of Persuasion (Patchwerk, Gluth, Naxx 25)
-143.9 + Runed Scarlet Ruby
Boots of Forlorn Wishes (Razuvious, Gluth, Naxx 25)
-142.81 + Runed Scarlet Ruby
Sandals of Crimson Fury (Exalted Wyrmrest Accord)
-139.65 + Runed Scarlet Ruby
Boots of Impetuous Ideals (Loatheb, Gluth, Naxx 25)
-135.72/184.19

EnchantIcewalker (+12 crit, +12 hit), Nitro Boosts (+16 crit, Engineering Only)

Rings

Signet of Manifested Pain (Kel’Thuzad, Naxx 25)
-140.35
Pyrelight Circle (Ignis, Ulduar 25)
-138.88
Inscribed Signet of the Kirin Tor (Vendor Purchase)
-124.95
Glowing Ring of Reclamation (Flame Leviathan, Ulduar 25)
-121.22
Radiant Seal (Iron Council, Ulduar 25, +MP5)
-112.72
Lost Jewel (Noth, Patchwerk, Anub’Rekhan, Faerlina, Razuvious, Naxx 25)
-110.57
Lady Maye’s Sapphire Ring (Iron Council, Ulduar 10)
-110.07
Titanium Spellshock Ring (Crafted)
-109.75 + Runed Scarlet Ruby
Ring of the Faithful Servant (Auriaya, Ulduar 25, +MP5)
-108.38
Band of Channeled Magic (25 Emblem of Valor)
-108.28
Frozen Loop (Hodir, Ulduar 25)
-107.06/167.32
Ring of the Fated (Noth, Naxx 10)
-103.47

Enchant+19 spellpower (Enchanter Only)

Trinkets

Illustration of the Dragon Soul (Heroic Sartharion)
-195
Eye of the Broodmother (Razorscale, Ulduar 10)
-186.77
Pandora’s Plea (Mimiron, Ulduar 25)
-177.22
Scale of Fates (Thorim, Ulduar 25)
-171.8
Sundial of the Exiled (40 Emblem of Heroism)
-166.89
Dying Curse (Heigan, Naxx 25)
-148/241.01
Embrace of the Spider (Maexxna, Naxx 10)
-147.8
Forge Ember (Heroic Halls of Stone)
-143.83
Extract of Necromantic Power (Sapphiron, Naxx 25)
-115.45
Living Flame (Razorscale, Ulduar 25)
-84.16/224.33

Wands

Scepter of Lost Souls (Vezax, Ulduar 25)
-81.09
Scepter of Creation (Ignis, Ulduar 25)
-68.83
Nurturing Touch (Auriaya, Ulduar 10)
-63.7
Plague Igniter (Grobbulus, Naxx 25)
-62.65
Wand of the Archlich (Kel’Thuzad, Naxx 10)
-59.45
Rod of the Fallen Monarch (Heroic Azjol-Nerub)
-56.58
Gemmed Wand of the Nerubians (Anub’Rekhan, Gluth, Naxx 25)
-55.92/79.5
Quartz Crystal Wand (XT-002, Ulduar 10)
-54.29/89.66
Fading Glow (Loatheb, Gluth, Naxx 25, +MP5)
-53.95
Touch of Horror (Gothik, Naxx 25, +MP5)
-51.93
Contortion (Trash Mobs, Naxx 10, +MP5)
-47.85
Wand of Ahn’Kahet (Heroic Ahn’Kahet)
-42.87

Weapons

All 1h weapons are scored as if paired with the best in slot offhand, Ironmender. Score may alter depending on offhand or hit rating.

Soulscribe (Yogg-Saron, Ulduar 25)
-728.09
Guiding Star (Razorscale, Ulduar 25, +MP5)
-708.65
The Lifebinder (Freya, Ulduar 25)
-688.21
Torch of Holy Fire (Kel’Thuzad, Ulduar 25, +MP5)
-678.21
Rapture (Iron Council, Ulduar 25)
-675.91
Stormtip (Iron Council, Ulduar 10)
-652.66
Plasma Foil (XT-002, Ulduar 10)
-647.68
Pulse Baton (Mimiron, Ulduar 10, +MP5)
-643.95
Hammer of the Astral Plane (Kel’Thuzad, Naxx 10)
-636.93
The Impossible Dream (Loatheb, Naxx 25)
-623.29
Ice Spire Scepter (Malygos, EoE 10)
-617.54
Intensity (Ignis, Ulduar 25)
-611.47/768.67

Enchant+81 spellpower to staff, +63 spellpower to weapon

Off-hands

Ironmender (Kologarn, Ulduar 25)
-116.72
Igniter Rod (Ignis, Ulduar 10)
-114.38
Accursed Spine (Noth, Gluth, Naxx 25)
-110.86
Matriarch’s Spawn (Maexxna, Naxx 25)
-104.44
Urn of Lost Memories (Gluth, Naxx 25, +MP5)
-101.83
Surplus Limb (Patchwerk, Gluth, Naxx 25)
-99.63/141.55
Iron-Bound Tome (Crafted)
-97.43
Faces of Doom (Crafted)
-96.46
Leviathan Fueling Manual (Flame Leviathan, Ulduar 25)
-93.48/147.19
Scepter of Murmuring Spirits (Sapphiron, Naxx 10, +MP5)
-93.12
Handbook of Obscure Remedies (25 Emblem of Heroism)
-90.79
Ward of the Violet Citadel (25 Emblem of Heroism)
-83.89/133.67
Watchful Eye (Faerlina, Naxx 10)
-74.54/112.22

credit goes to izolight from Shadowpriest.com for the base list.