I just picked up a 57" DLP. It kicks ass.
Your options for HD are DLP, Plasma and LCD.
Plasma being the most expensive.
DLP and Plasma will get you the best picture.
If you want flat, go Plasma, if you don't mind a thicker TV, go DLP.
LCD just isn't as good.
Plasma is super reflective - go to any store and watch a Plasma. If there's one behind it, you see the reflection pretty well. Plus, with Plasma, you can burn pixels and you can never tilt the television.
DLP will give you a damn good pic at a cheaper price, with relatively zero reflection and zero burn in issues...
Here's the one I got:
http://mitsubishi-tv.com/j/i/18326/T...s.html?cid=382