Spankandtank - Armory

So i was wondering if im ready to get into Sarth and Naxx 10 man... i pretty much destroy heroics right now, but I havent MT'd even Vault yet. Should i be looking to be hit capped?

Bonus round - hows my spec? Havent had any trouble with aggro, and it seems to working out well in 5-mans. how would it transfer over to 10man raids?