I still have cable and not very good cable at that. This concerns me because I have read that poor cable looks even worse on the bigger, newer sets. My problem is how do I evaluate this at the store when most do not have cable or if they do it is much better than what I have? Could I use a tape I recorded at home of a crappy channel to determine performance in the store? Would this be an effective and valid test of what the set would look like hooked up to my cable?