While I can't say if the B22 is the top of the line SS amp out there, if that is the case for the Apache that it retains the RSA house sound, then that totally doesn't interest me. The RSA stuff I've heard has this funky "warmth" to it, wit the bass being splatty and not tight. I can see why people mistake that as hi fidelity and quality , but I really don't think that it is, especially becasue I've heard it on stuff that I've been to live and performed in.