TJR, you are right about resolution....but, I won't pay extra for HD sat TV and common DVD players are not HD. So, for now, until HD TV is free and HD DVD players are cheap, 780i is all I need because that's the signal going in to the projector. What I can tell you though is the full digital, never converted HDMI signal from the DVD player to the projector provides a picture quality that is probably better than what you would get from an HD receiver being fed s-video or component video from a standard DVD player. You really can't believe how good it is until you see. I purposely bought a DVD player with HDMI output for just that reason.