I can offer a thought or two about the cons on the RR2150. First, B-stock is generally not going to be a bad thing, as the quality seems to be indistinquishable from A-stock and the warranty is the same. Second, the volume knob may or may not bug you - it bugs some folks a bit, but others don't mind it. Third, I don't think I've heard of any quality control issues aside from some hiccups when they changed factories a while back, and that was all sorted out at that time.

What speakers would you be pairing with either receiver?