I currently have 60's in front the 150 center 2 qs8 sides and temporarily I am using 2 little polk monitors in the back (Old BIC sub ...functional for now). I am demoing a Yamaha 5790. I rented Master and Commander and played it in THX EX(7 speaker) and THX (5 speaker) Hard to tell the difference! The QS8's are so awespome that there are ship groans and noises behind me and the qs8 are mounted 90 degrees to the side! Makes me wanna get 2 more for the rear! Again these speakers are incredible .I will next demo the Denon 3805 and maybe the Pionbeer Elite 56TX (brand new on the market) Must have Dolby IIX The best DSP going. It will be interesting to hear even better receivers with these speakers!