So I'm doing some early morning searching and decided to also look at this from the Toshiba HD-A2 side of things. I visited that "really big, but many times obnoxious" home theater web forum and looked in the HD-A2 thread. I found this about video output capabilities:
component = SD@480p , HD@480p/720p/1080i
hdmi = SD@480p/720p/1080i , HD@480p/720p/1080i
So as long as I pick the better SD DVD upconverter between the HD-A2 and the BDP-S550, and give that one the HDMI, I will be good for with my 720p Sanyo Z3 projector... Unless someone says otherwise... Then there will be no need for an HDMI switch...
