I have the Olivewood AC and just added the RSA B-52. Great pairing.
Such a wonderful amp. One the highlights for me at CanJam Chicago was listening to this. Ray had his MRD-R10, and it's the best I've heard these headphones. I've been keeping a small fantasty of getting myself a Ray Samuels amp since. Either the B-52 or (completely unrelated) the new B-21 (on which the Caldera soudned excellent, as did the K9k). The only problem is, at this point, another amp will have to go to make room. So I am negotiating with myself...
congrats!!