Just to clarify, you mentioned
It will need to have a Home Theater undisturbed pass-through.
Does that mean you will be keeping the Marantz processor in the system for surround sound processing, HDMI switching, etc.? If so, then you are just looking for a replacement for the PS Audio that has a home theater by-pass and balanced outputs... correct?
If you are looking for a replacement for both the PS Audio and Marantz, then the rest of you gear, the high end choices are boing to be limited. While I have not heard it, @kofibaffour's recommendation on the McIntosh is probably be the best "musically".