I won't indulge in what's right or what's wrong or if someone has crossed the line in this forum or if there is conflict of interest - that is for the site owner Mike to decide. But what I will say is that your room Bob is fantastic and very warm & inviting. I would be blessed to have a room like that.
However, I do have a question for you Bob - out of the three great speakers, which one do you personally listen the most and your personal liking ?
First, thanks for the kind words. As to your question... finally somebody wants to know about the SOUND!
Unfortunately, I believe it would be premature to give much of a definitive statement, as things are just starting to come 'round with respect to burn-in. The Alsyvox with their external crossovers still likely have a ways to go, I'd say they could probably use another 100 hours with about 150 hours so far. The Diesis, too, likely have a little further to go. The Bayz are probably pretty damn close.
Then there is the Pilium pre and power amp. The pre-amp is probably pretty well settled, I had it for a time before the amp arrived. I was lucky to have a friend loan me a pair of MBL mono amps so we could hear the Diesis which were the first speakers to have arrived. A little bit later I was loaned a DartZeel NHB-108 v2 from Jonathan Tinn here in Portland (who is the DartZeel distributor.)
(And a shout-out to Jonathan whom I've never met—and as I said before this hobby is
mostly made up of kind and sincere people. Being loaned a $53,000 amp from someone you've never met? How great is that! Thank you Jonathan I enjoyed my time with the amp.)
Now the big Pilium Achilles amp (Mighty Achilles!) is getting run-in, but it, with its HUGE capacitors, is taking the longest. Its coming around after having the typical ups and downs along the way. This Pilium kit is the real deal, another level altogether vs. my prior Audio Research Reference components. It is amazingly neutral, allowing the qualities of each speaker to be heard without coloration of the amplification. It took about 30 seconds of listening to the pre-amp to recognize, right out of the box, the huge distance between it and the ARC, which I loved.
The Diesis Roma I'm in love with—they are very, very special. Effortless, soulful, romantic. The Alsyvox—holy hell these are SPECTACULAR speakers. A planar that can go to 22hz eliminates any need for a sub. Between the Diesis and Alsyvox, at this early stage, I would offer a Venn Diagram, with the Diesis slightly left of center if the line split between subjective and objective, and the Alsyvox to the right of center, with a big overlap in the middle. So far, I could live happily with either. Diesis maybe slightly more romantic, Alsyvox slightly more analytical. They will appeal differently depending on your taste.
Then there are the Bayz. These are speakers that will fool you. Sure, the looks are super cool, but they play way bigger than the drivers would suggest. I'm still tinkering with placement—
in my room too close to the corner the bass can get a bit of overhang, too far out the bass becomes too reticent which shifts the tonal character. I think I have them close, at this point it is fine tuning and we all know small changes sometimes are all that is needed to get everything to snap into focus. That said, the omni-directional design just fills the room with sound. I've never owned anything like it myself, though I have heard my friends MBLs so recognize the sound but my room and their rooms are waaaay different. And the Bayz radial spearker (BRS) is very different from the approach MBL uses. I'd say the Bayz model I have, the smaller Courante 2.0 (at ~ half the price of the other speakers), gives up only a wee-bit of heft or "gravitas". For most rooms however you'd never know it, and only in comparing with the others would that difference be evident. The bigger Bayz, the Counterpoint 2.0 model, I think would wipe away any percieved lack of heft, but it could be way too much for a smaller room. A GREAT benefit of the omni design is the sweet spot is quite huge, you don't have to be anchored in the perfect position.
Again, these are but early, first takes on forming opinions of each speaker.