Would I be able to have the DVD in the HTPC also play SACD, or because of the apparent need for the 6 different connections for SACD back to the receiver would that be an issue?

If I could do SACD as well, I could replace the 2 DVD players (one was bought later just for SACD) as well as the VCR with one component. That would be a nice way to free up some space.