The SoundLabs you listened to had the PX panels? Just to please my curiosity, can you tell me the electronics that were used in the other SoundLab auditions?
IMHO no electrostatic speaker will give you the energy of a top box speaker, particularly the energy density of the X2 series 2, XLF or the Alexia. The Apogee Duetta Signature managed to do it, but had a problem for me - they had to be played loud to become a complete speaker.
Micro, that's a major consideration. About 10 years ago, I heard the Kharma Exquisites, and these became the spkrs that I aspired to, and started to save twds. But each time I heard them, they had to be played loud to become coherent, and I turned away.
Years later, I decided to go Zu, and a major plus point of ownership is that they remain organic and pertinent even at low levels. I've made a concious decision that any spkr I settle on has to sound good first at low levels before I go loud.
The Cessaro Liszts horns I've heard twice in the last two weeks sound great at whisper levels as well as belting it out.
Will these Graz Advance 7s be the same, or will I always have to play at "realistic" volumes? If they need to be played loud to come together, they will be off my list.