I may be way off here, and if I am...one negative chicklet for me!!
You are deciding whether to mount the rear surrounds hanging down from the ceiling, or to put them on stands behind the couch.
From your pic it looks like your wall is WAY back from the couch so when you say "I have about a foot or so to bring them out from the wall without creating too much intrusion" I'm not sure which wall you are talking about. I'm assuming you mean from the side walls so to “get them out of the path of traffic.
The key question here (to me) is height. If you have a high backed couch (like I do) they just don't make stands high enough to raise those speakers to the desired level (2 to 6 feet above ear level). If you don’t, then stands might be a viable option.
The other consideration seems to be the angle. According to the suggested layout by Dolby (
here) you may have them a little close together but it could still work. Grab you trusty protractor and check it out. Remember, rare is the perfect room, you do the best with what you have. Spiffy’s suggestion is a good on (moving the stands) but for me, it’d drive me crazy. But that is just me. I’ve got friends that do it and swear by it.
As far as m22’s or qs8’s, I don’t think you can go wrong with either one. If it were me, I’d flip a coin. As long as the 22’s aren’t flush with the wall (12 to 18 inches should be plenty) you could go with either. Call Axiom and they will help you decide without trying to sell you more than you need (this is from personal experience). Some people advocate monopoles for the rear speakers, other don’t. Either way, you are probably going to be happy so don’t stress too much about it.
However, if the only other option is to f-up the decor by hanging speakers from the ceiling (which I gathered isn't really what you want to do anyways), I consider going with a 5.1 set up. I've got 7.1 and love it but 5.1 is perfectly fine as well.