I purchased a panasonic (tc-p50x1) 50 in plasma. it is only 720p (thats all i could afford at the time) and I am now wondering if it would be worth it to upgrade my dvd player (non upscaling) to a blueray?Or is it just a waste of money since i only have the 720? Or maby just get an upscaling dvd player? I'm no tech guy, so any help here would be great. thanks