Have patience with a home theater newbie who just setup his first-ever a/v receiver (denon 2803) with 5.1 speakers. I want to make sure I'm watching/listening to Cable/DVDs/etc. the "right" way. I'm sure it's subjective, but I guess what I'd like to know, is how does everyone watch/listen to TV or DVDs? Is there any gain or loss in sound quality if I set the receiver one way or another depending on the source? The 2803 has so many audio settings that you can choose: auto, dolby, pcm, etc. For most cable, I guess the audio signal is just two-channels, but I can push some buttons on the receiver and then the 'dolby' or 'prologic' light comes on and I can hear sound in all the speakers. I'm just paranoid that there's a "correct" or optimal way to listen to the different sources.