Help! Can't decide between quadpolar or direct radiating for my surround and surround back speakers (7.1 setup).

1. Am I correct to understand that in a rectangular / shoebox type of room, four of the QS8's would produce a better surround field than four M3's?

Unfortunately my room is L shaped where the area behind my seating opens up on one side (small kitchenette).

2. Would direct radiating speakers do a better job of keeping the sound field "out" of the kitchenette and focus it more towards the seating area?

3. What about a combination of two QS8's for the surrounds and two M3's for the surround backs or vice versa?

4. How much clearance from the ceiling and adjacent side wall will I need for the QS8? Actually, this alone may force me to use the M3 instead since one of the surrounds would need to be mounted in a small recess putting the speaker only 1-2inches below the ceiling and 3inches away from the adjacent wall. I don't think a QS8 would like that tight of a space...

Any and all feedback welcome as usual, thanks in advance.