Well done, OP. A well written review; and lots of PS Audio gear in the mix!
I especially appreciated your insightful comment about how “personal” and long-lasting a speaker choice is, once you really get hooked on a highly performing, or as you put it: “the right” pair. I have had my Anthony Gallo Acoustics Reference 3.1 speakers for more than a dozen years and just can’t seem to justify an upgrade (at least not without spending a lot of dough to get a big improvement). As soon as I discover that changes in the kit upstream, room acoustics and speaker placement no longer result in an improvement of my enjoyment, I’ll start shopping for speakers. It looks like I should put the Treo CT’s on my short list. They appear to fit well with my value sensibilites (i.e., big bang for the buck), when it comes to this hobby.
KUDOS.