I have the exact equipment (except for that incredible sub!) I suggest you wire 2 sides if possible also. I have 4 QS8's and they are great. Before I added the backs I just had 5.1 going with 2 on the sides and they still projected sound as if from behind! Amazing. Anyway the 54 will sound tremendous adding the other 2 QS8's (or for that matter a direct radiating speaker in back and the QS8's on the side).