I'm the MT for my guild and we're clearing Normal TOTC, we're working on Ulduar hard modes and TOTGC.
My gear, I think, is pretty well rounded. I have about 52.4K HP and around 33k armor and about 46% dodge raid buffed.
I currently am using 6 +20 agi gems and I've been looking at some of the high-end druid tanks and they are gemming completely for stam. If I were to change my gems, I would be trading 110 agi for 165 stam (using a shifting for the meta).