I have NHT 2.5i speakers for the front, Super one's for the surround and looking for an AC2 for the center. I plan to bi-amp the 2.5i with an adcom 555 for the subwoofers and drive the remaining speakers with the receiver. I need the ability to switch 2 HD video sources, and the normal other stuff, I do not need 2nd zone capability. I am considering an NAD T743 or 753, Denon AV-3803 or Yamaha RX-V2400. I would rather have sound quality over features. I have $1000 total to spend. Any Suggestions??