For your stats the safe choice and the best choice most of the time is EH since it is always useful and the majority of bosses that kill tanks will kill them through some sort of burst usually involving unavoidable damage.
For your gemming I would gem all stamina unless the socket bonus is 9 stamina or higher, but alot of people choose to gem for the socket bonus if it's red and is only 6 stamina and put in an 15 stam 10 agility/dodge gem. In this point in ICC it doesn't really matter.
All of your enchants look great, I might grab 18 stamina for your gloves if I were you. With your frost emblems my next pick would probably be the off set gloves followed by the belt. Replace your Ashen Verdict ring with the Cluth of Fortification, 14 stamina in EH terms is simply not worth 560 armor.