I got 930 ilvl bear / 942 ilvl DH tanks and now I am gearing my DK tank. I have to say out of the 3 it feels the most solid and satisfactory. I have TONS of health/ insane self heals/ feel immortal in any 1v1 pvp fight / the only advantage being really slow and a bit boring. But damn I just came here to say how STURDY those DKs have been all the time without me even knowing. Their health is already one of the highest of tanks and if a Blood DK has a base health of 9 million in active tanking with Foul Bulwark + Souldrinker it is almost always above 12M. Thats awesome!