Subwoofer Suggestions

I am doing a light home theatre application in my living room with Monitor Audio speakers mounted in the walls. Yes, they have to be in the walls.

R250 hd center
Radius Cpic (front)
Radius Cpiw (rear/celiing)

Considering Monitor Audio MSW-10 ($450) or BXW-10 ($630).

I would appreciate comments on these speakers or alternate suggestions in the same price range.

Thanks,

Jim Perry