I'm using an HD movie that I purchased and downloaded from XBOX video store, and my TV is a Sony HDTV and is 1080p. I'll have to try it out on a different TV. Maybe it's my cable?
I purchased an inexpensive HDMI cable, but videos are really choppy and don't look very good on my TV. Have others been able to get good video quality via HDMI? Do I have to purchase the MS HDMI adapter to get decent video quality?