Hi Flyboy320,

Have you considered the Axiom M22v3 In/OnWall and the Axiom VP150v3 In/OnWall models for your system. Aesthetically they are identical to the OnWall models but sonically they are closer to the regular stand alone models. You have the best of both worlds.
M22v3 In/OnWall
VP150v2 In/OnWall

Furthermore, they are easy to install and they can go on an exterior wall. Here is a link on how to install them.
M3 In/OnWall Installation Video

The M22v3 In/OnWall has two small round ports on its bottom side and the VP150v3 In/OnWall is a sealed construction as is the regular VP150v3.

jc