I recently purchased this TV after much lurking on this site...as such, I feel the forum is honor bound to answer my questions.... 1. I know this TV upconverts 480i DVD info to 540p (or 1080i if I so choose). What about DirecTV non HD material...this is 480i right? Is it upconverted - what to? I run my Zenith STB SAT520 via DVI to the Tosh. 2. ESPN is broadcast in 720p and this format is displayed on my STB...is this signal converted? I think my TV can handle the 720p scan rate, right? This picture looks great but not quite as good as a 1080i HD picture. 3. This one really bothers me.....network broadcasts that I pick up OTA via my SAT520 (in the HiDef band) are in 4:3, however, the picture claims to be 1080i and it LOOKS 1080i, but clearly this isn't HD as it would be in 16:9 and 5.1 audio...so why does my Zenith claim the signal is a 1080i signal? Why does it look so much better than satellite? Is my stretching of satellite non ND programming killing my picture quality?