If you were trying to integrate them into that array. I would do the r11 for L/R the R2C for the center, the r3 as your left and right surround and the QS4 as rears. The side speakers in the 7.1 will get more of the sound than the rears in most applications. I switched mine from 5.1.6 to 7.1.4 and the bulk of the sound was always from the side surrounds more than rear in both layouts. Axiom makes floor stands for the QS series speakers if you want to place them in a more traditional 7.1 arrangement if you have room for stands. If they are going on the back wall i would experiment with height placement.
