It might be possible to go with the 975 (plus amplifier of course) and the OAW3 (The Outlaw stereo wireless transmitter/receiver). If your media server has USB output it could go direct in the OAW3 and then wireless to the 975.

The only possible issue I could see is if the OAW3 has a limit on the data rate into the USB that is less than the high res data rate of your media server. There something on the product page about it being "only" CD quality.