I own a Samsung 940mw 19" wiescreen combo LCD HDTV/computer monitor. The differnece between CRT and LCD is so amazing between day and night. With the 360 hooked via component HDAV cables and set on 1080i...whooooa! the picture is so clearer than what I would on a SDTV at 4-3 screen. I'm working on figuring out how to get 1080p out of the Sammy, but I dont think it supports 1080p yet.
I'm so hooked on 16-9 widescreen and I wont go back to 4-3. Also CRT? forget it. Another reason for picking LCD over CRT is the weight of the tv. a 19" LCD weighs so much less than a 19" CRT and that sure saves me a visit to the chiropractor