If you have the time to experiment you might try using the 30 day audition option. Order both M22’s and QS8’s an keep the ones you like the most. This would also give you a chance to try them in a 6.1/7.1 setup with the QS8’s as surrounds and the M22’s as rears.
I don’t have the M22’s but I do have my QS8’s in the back corners of my room about 7 feet behind the center of the listening position. I can’t imagine using any other speakers back there now. No matter where I sit on my futon the rear and side soundstages never collapse to either speaker.
