Thanks, Jeff. Indeed they are bigger than the M5HP. They reach lower in a more linear way too.
I watched a few speaker videos from Axpona. Listeners and manufacturers were extolling the various technologies and materials used in the speakers, the aesthetics and the nuances they heard in the treble and mid-range or how present the bass was or wasn't.
Not one described the soundstage they heard or didn't hear which includes depth, width, height, and layers. Not one described whether or not the speakers formed images, where those images were within the soundstage, their size, how well they were localized and rendered and the amount of blackness (space) between them.
With the positioning of the Braxioms you described, I bet at the correct MLP, you'd hear a holographic, 3D soundstage projected behind the speakers just like every Axiom v4. Images would be sharply defined with blackness between them just like every Axiom v4. This is largely what The Axiom Family of Curves is all about.
How much better this illusion can get with digital, active cross-overs, is an enigma for most of us.
BTW, this v4 soundstage and imaging is yet another secret Axiom never talks about.