I would not get Plasma. You can read in many forums about short and long term image retention. Those that sell this will write it's not a big problem. Why didn't they write it's no problem and the warranty covers it?
Question I was looking for a Gaming/PC Monitor/Movie TV and i'm torn between these 2 tvs.
VIZIO 55" M3D550KD LED 3D HDTV
Samsung 50" 7000 Series 3D 1080p Plasma PN50C7000YF