I have a very cheap($80 from Walmart) hdmi upconverting dvd player on a Panasonic 30" hdtv. The hdmi connection is visibly superior to the component connection, but when I upconvert the player to 1080i, I really see no improvement. I actually prefer to run it in 480p because the Panasonic automatically switches to a default high def color scheme(that sucks ass) whenever it sees 1080i. But the dvd player actaully has an incredible picture in 480p. I think it makes little sense to try and go beyond the dvd player's native resolution, especially when a progressive image looks so good, even if it is only 480p.
