You have a few options, one of the best may be to run DVI directly to your TV, then run component to your A/V receiver. That way you can really do an a/b comparison between the two formats. The Crestron system can switch easily between the two inputs as well which makes things easier. Never any family confusion when it is a single button that you are pressing.
I would be very careful when considering outboard records (DVD or VCR) as HD recorders (BD/HD-DVD) are due out this year. It's a question of how important dumping lower quality S-Video onto a DVD is compared to being able to make a HD copy of the material.... and of course, when HD recorders are available, will they allow you to copy the show to HD. Still many unknowns, but we do know that the best quality input on DVD recorders is S-Video composite... 480i.