I agree with the post above. Pala tank is very good, I didnt believe it untill I have met one.

I was playing enhancement shammy (dont tell me they do less threat then shadow priests :P) with epic gear and have met prot pally in CoT: opening of the dark portal. At start I was thinking that I am gonna be tank once more but actually the pally have lost aggro only a few times. Note that it was not that easy for even our MT to keep aggro with crazy shaman mashing da boss