Best thing to do is put there where you want temporarily, and see how it sounds. If it's good go ahead and mount. I used the QS8 brackets but mine are mounted on studs. I'm just a litte paranoid, being in SF Bay Area (earthquake country).

BTW, my QS8's are pretty off-center from the listening position. My Pioneer 45TX does some correcting w/ the MCACC and sounds great.

Oldskoolboarder Pix