I was very curious about these speakers as I really liked their footprint. I have a bit of a narrow room and working with Ravi, who provided great support throughout the process, I was able to get a Model 5 without the bass speaker, which I did not need as I use an active crossover with my distributed bass array. Unfortunately I was not able to really appreciate the speakers as one of them was damaged coming over from the Netherlands and had a constant buzz. From what I could hear though, given the cost, these are high value speakers.
Since then I was able to get my direct drive set-up working again. This is a pair of panels with the same footprint as the M5, powered by a direct drive amplifier so there is no step up transformer between the amp and speaker. The amplifier puts 5,000 volts directly on the panel. The system was designed by Roger Modjeski and only a handful if that were sold. I own his personal system.
The thing about Final is that they also can be powered by direct drive amplification. Twinstatic Audio in the Netherlands can build such an amplifier to be used with Final, which is an option I was looking into. Eliminating the transformer really enhances the sound and lets you realize what your speakers can really do.