Many HDTVs do a poor job of scan converting analog(SD) video. This is where the people who review HDTVs fall on thier faces, by not testing HDTVs on SD video!!!!
If I go into a store and ask to see what HDTV looks like on SD video the most salesmen have a deer in the headlights look( fourm members that work for BBY & CC are the excptions) and say they can't do it.
Try a Sharp or other 37" LCD maybe they will do a better job. John