Warren,
In my humble opinion, HD is GREAT on our 26" LCD. We only receive a few HD channels on DTV 101, but when at one of our home bases, we use an outside antenna, that picks up three DTV satelittes and allows more HD programming. Soon, we'll need to change receivers to allow more HD channels as we currently use a Hughs TIVO unit that is wonderful to use, but will not recieve the new format DTV is changing to. We can get some HD in motion, but it requires so much data, that it is prone to frequent errors and screen freezes. SD works fine.
My point is, we'll watch a tour of a paper mill in HD and enjoy it, while in SD, we would not give it a glance.
Mike K.