HD channels look good on my Samsung 42" Plasma. Non HD looks like crap. For instance, I was trying to watch the Indy F1 race Sunday and the pic was so grainy it looked much much worse than watching on in the old days with rabbit ears on a 19" tube tv. Is there something I can do to improve the quality. I don't expect HD quality, but I would have thought DVD quality or close to it was not too much to ask. I had that with cable.