You're not going to get a full 720p image out of digital cable (which has a standard definition, 480i image). You might be able to tweak your display features to eliminate the bars on the right and left side of the screen - either by zooming in (cutting off the top and bottom of the picture) or stretching the 4:3 image to your 16:9 screen - but the TV is going to say its displaying 480i when you're watching cable TV (since that's what you're feeding into it). I see the TV has a QAM tuner; have you tried plugging the HDTV directly into the wall (and avoiding the digital cable box)? Chances are, once you've scanned the channels, you'll find some of your local stations being broadcast in HD, even if you don't pay extra for HD cable. Alternatively, you may want to try plugging an antenna into the coax and see what kind of over-the-air (OTA) reception you can get in your area; every network in the country (with a few exceptions) will have to be broadcasting digitally by Feb '09, so chances are pretty good you'll find a few digital sub-channels you didn't even know about...even if you're just using an old pair of "rabbit ears". (Google 'AVS Forum' if you really want details about what stations would be available OTA in your area.) If your XBox 360 has an HDMI port (the black one does, as does the Halo 3 special edition, and just about any 360 bought new in the last year would have one), I'd recommend using that for your HDTV. That would allow you to use the component connection for your digital cable box (leaving the coax jack open for either an antenna or the QAM tuner). If it doesn't have HDMI, then just use the best available connection into your TV for the digital cable (HDMI > Component > S-Video > Composite / RCA > Coaxial), and let us know if that makes any difference. There are a wealth of options for improving what you have access to (I have a powered antenna to improve my OTA reception, for instance), but the goal should be to at least get you started without being on a first-name basis with the staff at Best Buy. (Which reminds me: NEVER buy HDMI cables from the store: monoprice.com is your friend, and you'll never notice the difference in quality between a $10 cable and the $90 cable they try to push on you.)