I will take exception to statements that all bdp's look identical. Well, maybe they do when you have a small viewing angle, with say a 50" from 14'. But, I will agree, even if not perfectly identical, with how good BD is as a source in general, by far the limiting factor is the display. This linked test is now old enough where it could not have included BD60, Oppo, and others, but you will see that only Panasonic passed every test. The PS3 didn't, the 350 didn't (identical video to 550), nor the Pio's or Sammy. The Sammy did worst in failing at least two HQV tests.
http://forums.audioholics.com/forums/showthread.php?t=47892
While the Panny is the only one to pass all, it does however suffer the greatest shift in color points. I've even started a thread asking about saturation levels of different bdp's, but from the limited response I've received, it doesn't seem like a good tree to bark up at. The Panny is already three generations old. I'd expect the present ones to be even better. After all, they're the ones that own the majority of BD patents, and their FW support seems to be indicative of that as well.
OTOH, if you want to game, well then DUH! Just get the PS3. End of story, game over, enjoy.