I don't have a high-def tv, but have been looking at Best Buy. Seems that I can get a 37" or 40" tv for about $1000 or under. So that's lookin' pretty good for me soon. I'll probably get an LCD or DLP technology - from what I heard I'd not get a plasma. I'd suggest spending time at several of the stores checking out the televisions as well as checking out your friend's tv's. So far I've heard bad things about Panasonic - and good things about Sony and Samsung.
There are several types of flat-panel technologies:
Rear projection type (it's the mirrors)
High Definition Links:
CNET - HDTV World
How Stuff Works Info