Hi all. I have a Toshiba rear projection HDTV, and I have one of the new Comcast HDTV boxes that has multiple output options (and a lot of nifty features which are apparently not yet used). The cable company by, default connects, the cable box using the three component cables to the "High def" inputs of the TV (the DVD is connected to the other "high def" input). Since I had a short spare DVI cable, I connected the cable box to the TV using the appropriate component. I am ashamed to admit that I did not see any difference, even for the high def channels. Should I have seen one? Which is better, in theory ? Thanks.