The reason I've had my eyeball on this speaker for so long is the combination of the large horn waveguide on an AMT. Nobody does that, let alone in a three-way sealed design. That's ultimately what you're paying for, regardless of raw specs.
What advantage(s) would you anticipate from this design paradigm? I've only heard a few ribbon tweeters and hated all of them (Triton, ML Motion XT, some old Adam) but I keep hearing how great AMT is so trying to keep an open mind