I don't know on the DVI/HDMI. There are probably others on the forum who can weighin better on the quality difference. For sure you would lose the video switching aspect of the 950, if you elect to use those connections. I'm using a Component connection on my home theater which features an Infocus 5700 front projector, but I also have an EDTV plasma in the room just to watch TV which utilizes a Composite connection. When I'm watching an HD channel on the plasma, it's hard to imagine the picture being much better, even though it uses the inferior composite connection. I've got two other HD ready TVs in the house, with HD feeds, utilizing the Component cables and their pictures look great, but not dramatically better than the plasma with the supposedly inferior connection.
The people who installed my projector say that they prefer Component because everytime they compared it to DVI, the DVI would be a little softer, less sharp. The advantage of the DVI/HDMI is that it feeds both Video and Audio to your TV. What you might consider, if the TV will allow it, is to use a DVI/HDMI feed from your cable box to the TV to use to just watch TV, without your 950 on. Then run the Component cables from the 950 to a component input on the TV that is different from the input that the DVI/HDMI is plugged into. Then you have some real flexibility and the capability of making a real comparison for yourself by switching between two different video sources on you TV.