I just bought a Dish 600 for Showtime HD and CBS HD. It is hooked up to a JVC D-ILA G15. I have noticed that CBS HD appears to look better in 720p as opposed to 1080i. The image is softer, a little less detail, but none of the graininess. Does anyone have any thoughts, experience, preferences. I always thought 1080I was supposed to be better than 720p. Now I am not sure.