Originally Posted by DaveZ06
Actually, the smallest is a 42' Panasonic. Again, if he wants to buy new, I suggest getting the Panasonic ST50. Image retention really isn't a big deal and you can't find an LCD with as low of an input lag number as you could with the Panasonic.
42" ST50 doesn't exist stateside. In fact, I don't think Panasonic will be selling any 42" plasmas in the states other than the 720p XT50... And only time will tell if that one ever sees the light of day.
Some Panasonic lcds have input latency as low as their plasma brethren. In particular, the 37" from last year (forget the model number) was well regarded. I'd wait to see the tests on the 2012 before making a determination but I'd expect them to follow suit. The motion resolution won't be as high as a plasma but, again, Panasonic is known for being strong in this area. Of course, with 60fps games this won't be much of an issue.