I'm trying to help my sister and brother in law piece together a home theater for their new home and DLP HDTV. Their living room only has enough space for a 5.1 setup. I was thinking of just getting a nice older receiver like a 5.1 Denon or Onkyo or something along those lines that is a couple years old but still good. They'd like to keep the price of the receiver under $250. What it will be connected to: -HD cable tv -dvd player w/ 1080p upconvert -5 speakers and sub (have not decided what to get yet) -50" Samsung 1080p LED DLP projection HDTV -HD dvd or BlueRay player sometime later I don't see the advantage in the new 5.1 receivers by a brand like Yamaha over an older 5.1 receiver from Denon or Onkyo. Is much lost in the audio if it is sent through a separate audio source if a receiver cannot process HDMI? Can I get similar sound quality from an optical connection? I really like the new Onkyo 605, but it is more than they want to spend... and they don't need 7 channels. I also saw that the Denon 588 is only a little over $300, but again 7 channels. Is it that much better than say, a Denon 3600 from back in the day? Am I wasting my time with an older receiver? Any suggestions are appreciated.