I play as a Warrior, not 50 but close. So i cant say how viable they are as a main tank in say a legit raid. I will say, ran Stone Vigil the other night. ON the final boss (forget the dragons name) dps all died to ice at about 75%, healer died at 50%. from 50% on, i soloed the boss and a win. took awhile, but it happened. I know this boss doesnt do a ton of damage, most of which can be avoided. but still.

My point is, if you know how to rotate cooldowns and use your heals to your advantage a WAR seems to pretty viable. KNowing when a large attack is coming and saying your inner beast for that hit helps ALOT.

I will also say, i watched a pally get silver on Svara....he was main tanking....i guess didnt do enough dmg to get gold...or maybe a big, either way. funny

Fact is there are no "solid" numbers or data to support which is "better". I entend to raid tank, possibly main tank just to prove a point. more to come on that