I posted a little RSA blurb in another thread... would link it, but I can't seem to locate it.
Anyways... The Balanced Max and the Luna are both many orders of magnitude better than the Apache. Even though I've never heard these three amps side by side, I feel confident in saying this.
One thing I will say is that I prefer the Apache to the B52, both with my K340's and Rays R10's. It actually isn't a half bad K340 amp. Both headphones sounded much better on my amp, though it would be hard to tell from the Ontario meet impressions. Everyone was so enamored with Rays stuff... it was like mass hypnotism or something.
Ray is a shrewd businessman, and a genuinely likable guy in person. Though I'd never buy one of his amps, I don't wish him any ill will.