I am using component cables, the funny thing is the comcast rep brought standard AV cables and hooked it up, he said it's the same thing, I went and bought a pair of component's today. I am awed at the Tonight Show, and I do see a difference in movies on HBO, but my basic question was does anybody know if the quality of HDTV broadcast's differ from each other by using different film. Example, Jay Leno looks great, movies look good. I would go as far to say that Movies look better in 1080I then on my progressive scan DVD player, but they don't have the clarity as such shows as Leno. I've seen nature programs in HD on the show floor at Tweeter that look amazing, but when I see movies on the same TV's there they don't look as good?