Wow! I hope you're not going to test me on the layout of your system! Quite impressive.

It appears you have the Sony TA-P9000 preamp in a similar arrangement to me. I kept my Sony EP9ES 5.0 DD preamp and have a relay switcher where I can select the output of the 950 or the Sony to go to my power amps and speakers. I then loop my mixing console through the relay-operated-no-bass-management 5.0 bypass inputs of the Sony. The Sony has a Smart CircleSurround EX adapter on it's surround outputs, and I have the option of using the 950 to decode Dolby EX or the Sony. They decode it slightly differently, with the Sony getting the nod most of the time. The Sony also has a couple "theatre" settings that simulate the sound of a big movie palace pretty well. I use this setting sometimes for listening to old black and white movies from the 40s and 50s.