Hi Bobby,
And as I hope you gathered, I am a big fan of your VSM speakers. Ever since I first heard Lloyd Walker's tweaked out older pair, I have been impressed. Your new VSM-MX is, in my opinion, a superb speaker; I've really enjoyed listening to it in Sbank's system.
As to the amps, probably my preferred choice would be the Atma-Spheres. But as to the Joule, what I hear is a richness and bloom in the mid-bass (subtle) that adds a beautiful warmth and some seductive richness that, ultimately, I don't find as truthful as the Berning or the Atma-Sphere tonal balance. I also hear a complementary "sweetening" in the top end; not so much as to describe the amp as "polite" but still makes the amp more "pleasing" to my ear than neutral. I clearly don't want to overstate this, because compared to traditional transformer tube amps the Joule delivers so many of the benefits of an OTL design. This is why I suggested in my post that this may move closer to a matter of listening priorities. For me, I'd prefer the greater neutrality of the Atma-Sphere or the Berning. Also, I listen almost exclusively to vinyl with tube preamplifier so this may also sway my choices in finding the right synergy of equipment. And, I acknowledge not having heard the Joule recently so matters may have changed or my aural memory could be deficient. If you don't hear these same things (and they are subtle, not dramatic), I hope you'll balance my comments with your own so others are not mislead.
Regards,