Need some help here and hoping I can gain some insight. Purchasing first HDTV set - Opting for Plasma 46" or 50" - Trying to decide whether to save the $300-$400 with a 720p vs. a 1080p. I had been set on a 1080p - going for highest quality out there - but after doing a bit of research it appears most programming is transmitted in 720P and I've read several articles that say for a 50" set or less from the correct viewing distance there is little to no difference between the 2 even when the program is transmitted in 1080p. I'm also curious about the up-conversion for non-HD programming. some claim it looks better on a 720p vs. 1080p - I also wonder about how much specific Direct TV programming will even be transmitted in 1080p over the next 5 years (I realize some VOD is there already, but what about some of the major sports providers? ESPN, etc) - And back to my earlier point, does it even matter if I have a screen 50" or less watching from approx 10 feet? Any opinions / expertise would be greatly appreciated - I'm making the plunge specifically with SuperBowl, Olympics, World Cup on the horizon - so Sports and satellite programming is my primary focus rather than blue ray movies. Don't necessarily want to replace my current DVD collection. Thanks.