Here you go.... all you need to know. Get the 720P and move on with your life.
http://blog.hometheatermag.com/geoffreymorrison/0807061080iv1080p/
That tells it like it is. Let me take a quote from it for you:
"When it comes to movies (as in HD DVD and Blu-ray) there will be no visible difference between the 1080i signal and the 1080p signal, as long as your TV correctly de-interlaces 1080i. So even if you could input 1080p, you wouldn't see a difference (because there is none)."








