Dollar-for-dollar, your proposed Axiom seutp will easily outshine the other brands. Definitive Technology speakers have a bad habit of blowing fuses on their built-in amps, and Klipsch speakers don't offer nearly the value. I've auditioned B&Ws and thought they were overpriced.

Paradigm makes great speakers for any budget, at your price point Axiom will almost certainly be the better buy.

It is possible to wall-mount the M22, with the appropriate wall bracket.