I just bought a Sammy 5046. I have it hooked up to a SA 8300 HD DVR cable box using component cables. In order to see all channels in full screen, I have to set the t.v. to 1080i "stretch" mode. If I keep it at normal, all hd channels will be in fullscreen, but the regular channels will have bars on either side. This didn't happen with my previous t.v. (also a sammy dlp.) Am I doing something wrong? Also, my HD channels don't look quite as sharp as they did with my previous cable box (non hd). Is there a reason for this? Thanks very much for any feedback.