First of all, I should mention we already have a Sony 36" HDTV; it's a 4:3. We currently have a rooftop off-air antenna and are thinking about upgrading to HD. Since we've never had satellite, this would be a HUGE step up for us. Anyway, I went to Circuit City yesterday and got some info. on Directv and their HD programming. The salesman said since we're not currently Directv subscribers, we could get the HD dish and installation for free. All we'd need is an HD receiver and an antenna (a $69 Terk) to receive our local channels in HD. The receivers range from a $299 Hughes model to the Samsung, Toshiba, Sony models that go for a around $599. I will be connecting the HD receiver to my 5.1 setup and was wondering if there were any real differences or advantages to these different models. For example, would we see an improvement using the DVI connection featured on the more expensive models, or would a component cable make more sense? Thanks a lot for the help.