The movement to HD not only improved my picture but really cleared up the clutter behind my entertainment center. Here's my old configuration. And here's the new:
Input from the cable goes directly into the Scientific Atlanta 8300HD DVR. It feeds HDMI into the Sony KDL52W3000.
The Philips DVP5982 DVD player also feeds HDMI into the Sony.
Finally, I added a Haupagge MediaMVP 01000 to get the SageTV PC out of the living room. This feeds S-video into the Sony. More on that later.