I am looking at purchasing M60's, 150, QS4's and either an SVS PB12-ISD/V or SVS PB12-ISD/2 sub. I am looking at the Denon 2805 or Yamaha 1500. I prefer the Denon because of the extra component in. Any opinions if this is enough receiver (or for that matter the best $500/$600 US dollar receiver for these speakers) for a 22x17 room? Is it worth the upgrade to the QS8's?