I recently bought a Sanyo 42" plasma HDTV (DP42746)on sale at Walmart for $600 on an impulse buy, without doing any research first. This is my first HDTV. I have Dish Network with a non HD DVR receiver, which worked great with my old standard CRT TV. Most channels don't look very good when viewed on the new TV. The people especially kinda look like cartoon characters or something. When I use the digital antenna input on the new TV with an old circular UHF antenna, and view over the air digital or HD channels, the picture is great. Is this just how non HD shows look on all HD tv's, is it something to do with dish network, or is something wrong with my tv?