Most receivers do not actually "upconvert" anything. Changing composite, S-video, and component signals to HDMI is NOT upconversion, though its called that on most. Real upconversion is going from 480i\p to 1080i\p. Some receivers do actually have upconversion processors, but if the input signal is already hi-def, they wouldnt do anything.. so you wouldnt need to pay extra for it. Simple HDMI switching would be fine.