Early this year we bought an HDTV receiver for my house at about $200.It was the biggest waste of money we have spent on household equipment. Judging by the hype surrounding HDTV, you would expect that switchingfrom standard broadcast to HD would bring a noticeable difference inquality that somehow makes the entire television experience better.This is not so. There is a slight improvement in quality. When I stoppaying attention to the show I am watching and focus instead on thepicture qual...