Just ordered 2 In-Wall M3s to complete the setup in the bedroom!
I know, I will have to post pictures of all the stuff soon!
BTW, the new receivers are 2 Pioneer VSX-1023-K. They had the minimum specs I needed (AirPlay, management through telnet commands and 2 powered zones) in a holiday special (400$ each at a store nearby -- it was 499 at Best Buy at the time).
Anyhow, finishing some phone apps and modifying my remote software to take in all the new possibilities. So far so good!
Can't wait to receive my new order!