Actually starting to die now, almost done act 1 on nightmare. I like the ranking up of difficulty, it's going well. Made me go to the AH and buy new weapons, went from 550 DPS to 1100 for only 6k Gold. I can KIND of see what people are getting at when they say the AH makes it a touch easy - but I mean, the game just started - you need to give it time to find a natural balance.