I play on Panasonic 50" Plasma = awesome colours but you need to keep some distance
I play on Philips 46" LED = more or less same as plasma, very nice
I play on 30" LCD = less vibrant colors but the most crisp picture, but honestly very small difference.
If i would have to choose i would say Plasma because of the colors.
................
edit: important info
Remember that when you use a "TV" you will be stuck with HDMI, this means a set limit of 60hz framerate, IF the TV has DVI this is what you should use
Also, when you test u must make sure things like "smart picture" and stuff is turned off because its very common in stores these are turned on because it will make still pictures or similar look good but make moving pictures skewed, classic example is soccer where the ball lookes like mouse tracing is turned on.