Well, if your budget extends to $1600 you have more options. What budget are you considering?
I have read very good things on this forum and a Stereophile review about the Outlaw receiver mentioned by Yogi. I have not heard it however.
I happen to own a Yamaha A-S701 which I use to drive a pair of B&W 685s in a secondary system. The amplification stages in the 701 are the same as for the 801 (100wpc). The difference between the two units is the DAC. Use this system outside and can tell you it drives the 685s well. The 685s are an earlier version of the 606S2 in the 600 line. Both are 8ohm however drop a little below 4ohms in the mid bass region. The 701 retails at $750 - $799 new with free shipping. The 810 is $100 more and was reviewed in The Absolute Sound.
I have also driven the 685s with a NAD C356BEE (80wpc) which is discontinued. This unit lacks internal DAC however. A good buy used at ~$350.
I can't speak for either the Cambridge or Rotel units you are considering as I have no experience.