@jjss49 , I'm totally pleased! I'm truly appreciative of all the thoughts, recommendations, and insights. I have a literal list next to me (now adding the w-b vertex), and I've emailed Reference 3A about dealers. The hunt is on, at least in the imagination! (Begone, covid!)
I have a question for anyone reading this. Is there a general principle about how much space is desirable behind the listening chair? I'm noodling around with my small room but the chair would likely have to be right up against the back wall. Or, I might ask it this way: with stand mounts, what triangle dimensions would be getting too small, the chair and speakers too close together? Of course it depends on the speakers, etc, but I'm wondering if there's a rule of thumb for near field listening.