Generally DLP has had a better overall contrast, however, LCD is getting better and better. My z2 is rated at 1300:1, and I think the Z3 that just came out is 2000:1 Painting the back walls black or using a black fabric will increase the perceived blacks very well. I am even going to paint my side walls and ceiling black about 5' out from the screen.....

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85