What is the best OTL out there?

Tubegroover-
Yes. No personal experience. But my history with Rick Brown makes me comfortable about conveying his endorsement.

This is the ONE I've been waiting for from Berning, a Class A single ended amplifier with zero feedback, no iron and 60 watts of power! Sure would love some feedback from those that have heard this system. Unfortunately the price puts it out of the realm of all but the well heeled. I wonder how long it takes David to complete a pair of these amplifiers?

Best sound is subjective, but if you want the best support, the best service, the best upgrade path, the best reputation and history, then purchase Atma-Sphere.

I have owned Joule (VZN-80), Atma (M-60), and Berning (ZH-270), but not all at the same time. Tried running the Berning source direct and it did not make it for me. Had the Joule and Atma at the same time and both are excellent. In the system I had at the time, for my taste, I preferred the Atma. Given the current status of Joule as a company, I'd agree w Brf.

Atma-Sphere would probably be my first choice. Ralph is constantly posting on forums trying his best to help people. The vast majority of them don't even own any of his products. For me personally, stuff like that is a huge plus.