I haven't heard a BHA-1. I have owned Bryston gear and liked it, so it's on my list.I just noticed that the Bryston BHA-1 has a 20-year warranty! Besides imagining how it sounds, this is a major plus. @geek707 any personal impressions?
How about the new iCan Phantom? It appears a good choice, and can drive electrostatic phones.
I admit I'm very interested in what you find, I'm currently considering going the same direction.
Zaehl is out of my price range though...