I have a Panny PT-47WX49 16x9 tv, and just got HD cable today through Time Warner. I have the Scientific Atlanta Explorer 3100 HD cable box, hooked up through component for my HD HBO(s), and Showtime(s)the HD HBO(s) and Showtime(s) look stunning! Regular cable looks alright, nothing like HD though. My question though, should I view normal cable through the component or switch it to channel 3 to view regular programming? The reason I ask because my Panny locks on to the aspect ratio, I think that's what it's doing, and with regular cable which is in 4x3 there are black bars on both sides, should this be a concern for burn in? If it is, I'll just switch to channel 3 and watch regular cable through there were I can change the zoom mode. Thanks, if you need any other info please let me know.