I'd use HDMI first; it gives you the option of upconversion, which isn't available via component, and it avoids D/A conversion if you have a digital TV (like your DLP). If the TV accepts, as well as scales to, 1080p (some can only scale to it), it will accept every other consumer format, but it will have to upconvert all of them to 1080p. If the TV has 1:1 pixel mapping, which I doubt, it can show lesser resolutions--like 480p or 720p--at the center of the screen, leaving the rest of it blank, but, for the most part, digital TVs are restricted to showing everything that enters their inputs at their own native resolution.