Our rooms and setups sound almost identical. Mine is 12.5' x 25', hardwood floors, sitting 8 or 9 feet away and I've got the M22s. I know if I personally had the scratch right now, I'd probably spring for the M60s. I love my 22s, but there are occasions where I feel like the 60s would be better suited to the size of the room.

M22ti mains, EP175 sub, VP150 center, QS4 surrounds