Are there any current production great speakers using AMT tweeters?

Since they fit your requirements, I will mention the FinkTeam KIM speakers. I recently upgraded to these and they are quite special. Like others have said, there are a lot of variations on the AMT’s out there, they are not all alike. FWIW, I heard a set of the ESS towers way back in high school, running with a high end Yamaha system. I have never forgotten it. 

As mentioned in an earlier post,  Legacy Audio,  but not just Aeris and Focus.  The Signatures use a dual AMT,  and the Classics use an AMT tweeter.  Both are in your price range.  I had the Classics for about 3 years,  then I upgraded to the Signature SE,  which I still have.  IMO,  they are both great speakers.  Really great imaging and detail,  which are my hot buttons. 

Gobel.

Numerous Wolf Von Langa models, Cinnamon Ellipticum, Viva Audio Allegro, come to mind.

I was also going to say Qualio. You order them direct from Poland (they pay for shipping) and all 4 of their models use dipole AMT tweeters. The IQ and IQ Ultra also have interchangeable attenuator resistors to control how hot the tweeters are, very similar to what Volti does. May help with your smaller room. They get nothing but rave reviews. I'm pretty tempted myself but I'm leery of what the customs/tariffs on them may be. If you order some maybe you can fill me in on that!