Jon,
What's the ceiling height? Your room is getting kinda big for M22s and a VP100. The seating distance from the speakers makes a large difference in how hard the woofers have to "work" to produce a particular volume level at the listening area. By the way, my response to your post on Reference Levels in Technical Questions includes comments on levels I use with M22s, QS8s, and a VP100 at a distance of about 10 feet in a room that's significantly smaller. (13 x 19 x 9).
I would nudge you up to floorstanding M60s, a VP150 and QS8s to achieve clean playback levels at a 15-ft listening distance with peaks in the 90- to 98 dB level (or more). M22s used in that application would be pushed beyond their capabilities, in my judgment.
Regards,
