Honestly, I think Atma-Sphere jumping into a "Class D', GaN amp is one of the most interesting developments in HiFi in a quite a while. I've always admired the Atma-Sphere OTL designs, but ended up wanting a slightly different sound so I went with Joule Electra and had a pair of VZN-160s for years. I also spent a bunch of time listening to David Berning's "OTL" offerings about 20 years ago and actually own a Linear Tube Audio amp now (among others).
A couple of weeks ago, I picked up a Technics g700m2 ($2,699) to play around with and I've honestly a bit stunned by how good it is. I haven't gotten around to "picking winners" (and probably never will) but the Technics competes with the LTA Z40i and McGary/Backert Labs combo that I have in another room (speakers are Fleetwood Deville's and Volti Rivals). They all have different strengths, but it's really hard to find fault with any of them. I tried the same experiment with a NAD M33 last year and got rid of the M33 in a couple of months.
I think there is a really good reason that Ralph went with GaN when he decided to take the class D plunge--I suspect it may actually be a game changing, transformative technology in the audio world. I've played with the Technics (and love it), and also have heard the AGD "Tube" GaN amps quite a few times (which is also great). Looking forward to hearing the Atma-Sphere version at some point, so really interesting to hear the OPs thoughts on his new amps. I wonder how many manufacturers will be pumping out GaN based amps five years from now?