I just bought a 42" Vizio from Walmart and it's pretty nice (and very inexpensive). My biggest complaint is the speakers are terrible and it came with 1 dead pixel in the lower right corner. It's impossible to notice unless you are inches away from the screen.
i got it for 600 bucks and it is 1080p. I have tried finding a 37 LCD in 1080p for under 600 and couldnt. A great buy for your Xbox or looking up the mac.
I bought it for my bedroom so I could hook my MBP up to it. Its 720p but I have a bigger plasma tv thats 1080p and I dont see too much of a difference.
I have the Sony 19" KDL-19M4000. It runs at 1440 x 900 resolution, decent picture when connected to my MacBook (it has a VGA connector). This TV can be had for about $300 or less now. The TV picture itself is 720p, excellent quality.