A frost dk in tank gear, pre-raid, pre-heroic I hit 27k hp pretty sure. Not long at all spent at 80. Not long at all.

Oh yea, only 505 defense or something, but belt needs to replaced as well as a few gems. Need rep enchants and get a nice big 2h with the gargoyle rune on it. Atm I'm dual-wielding with a dps mace and a dodge rating sword.