Do you have port plugs for the M22's? Seeing as you will have a massive EP-500 to do bass duties, plugging up the port at the back of the M22 would reduce the need to pull them out too far and help minimize weird sound dynamics. If you don't have port plugs, ask Axiom to send you a pair when they ship your EP-500.
You have an M2 for the center channel, but what is the center channel we see above the TV? Why not raise the shelf your TV sits on and squeeze that center channel underneath it? That way your center channel will be better aligned with your M22's in there new upright positions and closer to ear level.
Nice country house.
