I would like to assemble a 5.1 system. I went to the local audio specialty store and they were talking about non-HDMI receivers. You run HDMI video into the display, and then optical out fo the display and into the receiver, etc. They were featuring a Denon receiver for about $450. My question is what brand(s) should I get and what is the least I can spend to get decent 5.1 sound? I want to be ready for HD DVD, and want a good sounding package I will be happy with for a while.