Music Reference amps are usually available and I think at most times there is at least one up on the site. Just about 3-4 weeks there were three amps, two different models. I've also heard they are reliable but have recently been told by a 30 year audiophile they originally were not.
My vote goes for Air Tight. Don't come up very often but then they are a small outfit and only make pretty expensive stuff. By that I mean their cheapest amp is $7,000.00.
