I'm new to the a/v scene- want a 5.1 hometheater zone, and 2 separate audio zones(living room, outdoor area) so that all 3 can play different sources simultaneously. Looking at Onkyo 717/818 or Denon 3312. What recievers do you recommend? or should I just concede the 2 audio zones and run both as 1? If so can the reciever power all four speakers on the second zone? Thanks for time/help.