What is the best OTL out there?

I love that Bernings amps get picked apart yet when someone says that they use an autoformer after the output of a OTL the only thing heard is the crickets.

I don't think anyone picks apart the Berning- its an excellent amplifier, a brilliant design, with excellent reviews and isn't an OTL.
As a separate issue, using an autoformer on an OTL allows you to solve problems- usually one where the speaker desired is simply unsuitable for the amp otherwise. We have a lot of customers here in the Twin Cities that like to use Magnaplanars with our amps, and especially with our smaller amps, the autoformers are a good idea. A good number of people that don't have OTLs also use the autoformers, including people with solid state amps, for no other reason than it sounds better. This is true because all amps have lower distortion when driving higher impedances. 

Whether an amplifier is an OTL or not is an entirely different subject from how it sounds. Personally while we make OTLs, I don't see other OTL manufacturers as the competition so much as just other amplifier manufacturers in general.

Atmasphere's point that "all" amplifier types make less distortion when driving higher impedance speaker loads is an audio pearl that is  unrecognized and under appreciated by many listeners. I understand this dilemma given the dominance of 4 ohm speakers in the current High End audio marketplace. Transistor power amplifiers  made these lower impedance speakers quite viable.
Charles 

@ michaela: I have used original Julius Futterman OTL's successfully with Quad 57's and KLH Nines. I presently have a Harvard Music stereo and a pair of H3AA's. The 6HB5 and 6LF6 TV sweep tubes Julius used as outputs could handle 1.5 amps of current apiece. Making them suitable for this application. However, speaker impedances below 6 ohms still stress these OTL's too much. An autoformer is then recommended.

@charles1dad  excellent post! And that's why I say that the transistor ruined audio, it allowed all these hard to drive speakers to saturate the market place. 

Hi 
analoluvr  admittedly with all things considered I do generally prefer tube  amplification rather than  solid state.   In all candor however I have heard very good sounding solid-state products so I won't throw them all out with the bathwater 😊.   Good  implementation of tubes sounds more natural to me  more often than not. Just a personal observation over the years.  I do acknowledge that solid-state dominates the audio market. 
 Charles