The m22's also have a bass port in back, not sure if they will work well in an enclosed area like that, the port allows low frequencies to filter into the room. I'm suprised Axiom didn't say anything about that when you called them...

Maybe you would have been better off with the W22's or the new T2's, you might have been able to incorporate them into those openings as they are designed for inwall/onwall mounting.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85