Well Like I said at the start, I'm currently cat, because I didn't think I was ready to tank. After what I've heard here though, I'm going to swap my gems, and enchants out to tanking and go ahead and make the swap. Thanks much for all of your advice.
One last question: What is your opinion on macroing Maul to every ability? I was trying it and found I had a SLIGHT bit of threat trouble if the others jump directly in immediately before I get to hit anything, but aside of that I thought it was working. I was also doing a regular dungeon with 3-5k dps, so I don't think that would tell me much, haha.