"The Imagine T2 Tower is newly released for the same price as the Synchrony Two and seems to have replaced it. It's a similar design, but includes a dedicated midrange driver which the Synchrony lacked.
The Synchrony One also has the midrange driver."
Thanks for the input. I'm beginning to see the situation a little differently.
I found on another forum (a dedicated PSB thread) complaints about some models only being available henceforth in the black ash and not the dark cherry.
Also, when you look at PSB's website, "tower speakers" are listed in a single column as Synchrony One, Imagine T2, Imagine T, etc. Clearly, then, the T2 ($3950) has replaced the Synchrony Two ($3500), and the T2's speaker array comes closer to the Synchrony One's. For the moment, though, the Synchrony One is still the flagship model, and I wouldn't be surprised eventually to see a new top-of-the-line Imagine T model (T1? T3?), though it's hard to gauge whether this might be in the short or medium term.