World of warcraft Warriors or DKs?

I have played a warrior for a long time and i love to play him, but with the new DKs out i Like there style play as well Plate gear Malee dmg, hard to kill. do you think its worth me Re-Rolling a Death Knight. I will not be tanking with either of them im all about Lazy DPS. and my next question is will DK hit harder do more dmg than warriors in PVE,PVP?