Bought a Panny 50" ST60 Plasma last week and it's just not bright enough (or big enough) for the living room in my new house. Gonna put the plasma in the bedroom and move into one of the aforementioned. Both of these models are offered at BB, just curious if anyone can tell me the difference between the two? I'm assuming the 750 is a "Best Buy" only model, but are there any feature differences? Many thanks in advance.