You are experiencing one of the "issues" with running your video through your audio receiver. I have posted, many times, let your audio gear do audio things and let your video gear do video things.

Most of the newer TVs, especially the HDTVs, have multiple inputs so switching should not be an issue.

The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV