I just moved to Dish from TWC. I have the 722 K and a 58" 1080P Samsung. I haven't seen the picture improvement from cable to Dish that I expected, may be slightly worse(still good). I noticed the installer had the dish set to 480P in the HDTV part of the setup menu. I changed this to 1080i. Any difference between this and 720P. On TWC it showed the stations input(either 720P or 1080i. I'm guessing that my TV is picking the right one no matter which one I choose but I'm not sure. Any help or comments to let me understand would be appreciated. Thanks.