Moth3r said:

For gaming, I'd say an LCD - plasma TVs are more vulnerable to screen burn.

Ack! Don't perpetuate this myth :)

While it's true that older plasmas could burn easily if you displayed the wrong material for too long, newer plasmas have phosphors that age at the same rate as CRT phosphors. In other words, plasmas are no more likely to suffer from permanent burn-in than a good CRT is, so it's nothing you need to worry about. There might be some minor image retention when the panel is new (<1000 hours of use), but it lasts only seconds and fades once a different image appears onscreen.

I used to do 6-hour Fallout 3 marathon sessions on my previous 42" Panasonic plasma, and there was never a hint of burn-in after a year of such use. I game happily on my 50" Pioneer Kuro. No problems there either.