I had a similar problem which I solved this way: Most of the time I just run the TV, the 950 and the M200 with the center channel only for sound. All of the input devices and the M200 run through a Panamax Max 5300. When I turn on the TV the 950 senses that it's needed and turns on the M200 with the 12v DC trigger (TV, DVR and 950 are plugged into the always on circuit). When I want to fire up the whole system I created a RC macro to turn on the 2nd Zone (which I'm not using) and it's 12v DC trigger starts the Panamax 4300 which has the additional amps for 5.1. This also gave me the ability to split the load across two 20A circuits for better power distribution which provided greater sound quality. More info here

I use the Panamax line of products which have worked well in my system.
Panamax Listing PDF