I have both a 990 and a Ref 50 S2 (in different systems). I can't stand all the relay clicks and speaker thumps generated by the B&K. My Outlaw is completely silent when switching, but it misses the first half-second of audio when I load a CD. The B&K has the best remote and allows me to verify the surround mode without changing it. I hope the Outlaw is easily upgradable via website like the Newcastle. I hate the idea of having to ship the B&K back and forth. I'm keeping the 990 and not sure about the Ref 50.