I've got a 1994/1995 Denon AVR2500. The surround sound is Dolby Pro Logic 5.1. Was a decent A/V reciever when I bought it, and I haven't even considered upgrading since I love the music sound and it did a fine job with surround sound on the movies I watched. Works well as a video switch with it's composite(?) cables and S-video. Now I've bought a new TV (Sony Grand WEGA™ LCD RPTV KF-42WE610), a new DVD player (Denon DVD1600). Both will be delivered next week I'm seeing all this new digital output and Dolby Digital stuff. Also, it's clear the 2500 won't work as a video switch with the new component video. Since I haven't been paying any attention the past 8 years, I'm clueless about this. But it's got me wondering if I should buy a new receiver. So, I have a few questions. I think that the Pro-Logic surround sound I have now is really simulated surround that the 2500 generates from the stereo inputs. Is that correct? How is Dolby Digital different? And should I notice a substantial change from Pro-logic. Are new AV receivers today capable of doing a good job serving as a video switch. Or, regardless of what I use, will I still be better off going directly from source into the monitor. Thanks for any help you can give to these (possibly dumb) questions!