That's an important question, but I think David already hit on the even more basic question. If WGN-HD isn't in your HD tier, it sounds like the WGN you're watching is just the regular SD broadcast. The fact that it says "In Hi-def where available" unfortunately sounds like it doesn't apply in your case -- it's probably referring to those areas where the separate WGN-HD channel is available. I thought B was joking, but who knows. :) Actually, I wasn't. Before I got an HDMI cable, I had some channels come in better than others. How much of a difference does an HDMI cable make over normal HD cables? HDMI cables and component cables are no different in picture quality. EDIT - I probably should've worded it different. One isn't necessarily better than the other, although HDMI offers more convenience and will be more flexible if/when resolutions continue to improve. That said, they're both really good and you're not likely to notice a huge difference, if any, and it really depends a lot on your individual set up in terms of which one is better.