Jim...welcome
I hope your enjoying your Rockets, great speakers...
Anyway, the Q's are very forgiving on placement. Will they be mounted to the side of the couch, a little behind, or a little in front? Also, how high are you planning? They do best 2-3 ft above your ears when sitting, or even higher. Mine are about 7ft off the ground.
Also, how much space would there be from the back wall, to where your going to mount them on the side walls? You will probably be ok, as the rear tweeters would direct sound off the back wall, and give you an enveloping sound.
Are you planning on mounting any speakers on the back wall for 7.x?