I just had my 622 installed this past Saturday. I have it hooked up via HDMI to a Samsung 1080p DLP specifically a HlR-5668. I can not get the SD channels to stretch to 16:9. I went through the HDTV setup to no avail on the 622. HD channels display correctly. I know many people do not like a stretched version of SD... I am on the fence but my wife kind of got used to it. I was able to stretch on a 508. Has anybody else noticed any appreciable difference between outputing 480p,720p and 1080i? It was set to the default 480p and the picture was amazing. I viewed the tv for about an hour late at night then I changed it to 1080i but did not see a dramatic change. Is the lack of dramatic change due to the TV's internal scalar/processor ?