Bet you warriors want to get geared up with some imba gear before you start Karazhan, so here is: Execute's pre-raid tanking gear.
I'll list the items by slot, and the best enchants to get on them, the top item on list is the best. (Please note that I haven't included crafteds that include a lot of mats, only the ones that are reasonably cheap to make.)
Head
[item]Myrmidon's Headdress[/item] Quest reward from SV.
[item]Warhelm of the Bold[/item]Drops from last boss in Botanica.
[item]Felsteel Helm[/item]Crafted.
Enchant: [item]Glyph of the Defender[/item]Keepers of Time revered.
Neck
[item]Thalodien's Charm[/item]Reward from http://wow.allakhazam.com/db/quest.html?source=live;wquest=10365
[item]Strength of the Untamed[/item]CE revered.
[item]Maladaar's Blessed Chaplet[/item]Drop from Exarch Maladaar in Auchenai Crypts (heroic).
Shoulder
[item]Fanblade Pauldrons[/item]Drop from Shirrak the Deadwatcher in Auchenai Crypts (heroic).
[item]Shoulderguards of the Bold[/item]Drop from Murmur.
Enchant: [item]Greater Inscription of the Knight[/item] or [item]Greater Inscription of Warding[/item] Depends on whether you're Aldor or Scryers (they both require exalted reputation).
Back
[item]Devilshark Cape[/item]Drop from last boss in SV
Enchant: 12 dodge>12 agility>120 armor
Chest
[item]Jade-Skull Breastplate[/item]Drops from second boss in Mechanaar.
[item]Vindicator's Hauberk[/item]revered reputation with Aldor.
[item]Breastplate of the Bold[/item]Drop from last boss in Arcatraz.
Enchant: 150 hp>6 stats
Bracer
[item]Vambraces of Daring[/item]Drop from last boss in Ramparts (heroic).
[item]Sha'tari Wrought Armguards[/item]Reward from http://wow.allakhazam.com/db/quest.html?source=live;wquest=10091
Enchant: 12 stamina
Hands
[item]thatia's Self-Correcting Gauntlets[/item]Drop from Dalliah the Doomsayer in Arcatraz.
[item]Gauntlets of the Chosen[/item]Scryers revered.
[item]Gauntlets of the Bold[/item]Drop from last boss in SV.
[item]Felsteel Gloves[/item] Crafted.
Enchant: 15 strength
Waist
[item]Lion's Heart Girdle[/item]Drop from last boss in Ramparts (heroic).
[item]Girdle of the Immovable[/item]Drop from last boss in SP (heroic).
[item]Sha'tari Vindicator's Waistguard[/item]Reward from http://wow.allakhazam.com/db/quest.html?source=live;wquest=10704
Legs
[item]Timewarden's Leggings[/item]Keepers of Time revered.
[item]Greaves of the Shatterer[/item]Drop from last boss in SH.
[item]Felsteel Leggings[/item]Crafted.
Enchant: [item]Nethercleft Leg Armor[/item]
Feet
[item]Boots of the Colossus[/item]Drop from first boss in Mana-Tombs(heroic). Thanks to Tarciryan for pointing this out.
Enchant: 12 stamina
Finger
[item]Violet Signet[/item]Requires friendly reputation with The Violet Eye, and you should be friendly aftr completing the attunement.
[item]Elementium Band of the Sentry[/item]Drop from last boss in Arcatraz.
Enchant: 4 stats>2 weapon damage. Not that you have to be enchanter do these, and the mats are absurd.
Trinkets
[item]Gnomeregan Auto-Blocker 600[/item]bought with Badge of Justice.
[item]Adamantine Figurine[/item]Drop from first boss in SL.
Weapon
[item]The Sun Eater[/item]Drop from last boss in Mechanar (heroic).
[item]Grom'tor's Charge[/item]Reward from http://wow.allakhazam.com/db/quest.html?source=live;wquest=10588
Enchant: 15 agility>Battlemaster>20 strength
Shield
[item]Crest of the Sha'tar[/item]Sha'tar exalted.
[item]Ogri'la Aegis[/item]Ogri'la revered.
[item]Aegis of the Sunbird[/item] Drop from second boss in Botanica.
Enchant: 18 stamina>15 block
Ranged
[item]Gyro-Balanced Khorium Destroyer[/item]
Hope this guide has helped you a bit 
Execute out!