I am upgrading to a 7:1 and have the reference series for my center and fronts, 12" sub and the synergy SS1's for my side speakers. I was originally going to put another pair of SS1's for the rear but someone said those are best on sides. Then I was thinking of hanging a couple of Quintent's from the ceiling as my 2 rear speakers. Any advice on the proper speaker that will complement my setup?? Thanks in advance