Yes, heard them at RMAF. Well, I listened to the new Vapor Arcus, so in the same price league as the Berlin. I also listened to the smaller Briton, and did not know about the Chinese parts. Good to know.
Their sound characteristics are different, so it comes down to what you prefer. I found the sound of the Berlin to be a little more relaxed while the Arcus edged out the Berlin in dynamics. I think I was hearing the amplifiers.
The Cirrus Black that John mentions is 87.5dB, so that affects the amplification. The white is more efficient. The Berlin's were being driven by a 1.8 watt(2A3)Tektron amp, so they must be very efficient.
I thought both speakers sounded excellent for their price point, overtaking more expensive brands.
I had a lot of fun at the show. What I also enjoyed on the opposite ends of the spectrum were the Emerald Physics CS2P ($3,000) and the Rethm Maarga ($9,000). The first, super dynamic and punchy with good soundstage, the other extremely relaxed with amazing depth of sounstage. I think within this price range you're trading natural sound with dynamics to find something that works best for you.
For me and my grey hair, I preferred the Berlin speakers but the parts have me worried.