Hello, I am in the process of upgrading my home theater from an old sony htib. I have already purchased my speakers, 2 Polk M70 SII towers, 2 Polk M40 SII bookshelfs, and a Polk CS2 SII center. No sub...yet! I am using this with my old non-HDMI Sony 5.1 Receiver currently. I have been learning alot about AVR's on here. My question Is what kind of receiver would properly power my Polk speakers to their best audio quality. Would a Pioneer 1121 or a Onkyo 709 be overkill for my setup. I dont necessarily need a network receiver unless Pandora is gonna sound better coming strait from the receiver rather than my Blu-ray player or something. Would a Yamaha 667, Pioneer 821, 921, 1021, Onkyo 609, or Denon 1712 be plenty for my setup? I planned on Bi-amping(or wiring, not sure of the correct term) the towers to get them closer to their 275w peak with the two extra channels from a 7.1 receiver. Is this a good idea, or necessary? Any input would be awesome thanks!













