very interesting, thanks for the explanation, it makes more sense now.
To throw another wrench in the whole thing, I just read over at ascendacoustics that their tower is now available for pre-order, at $2000, so this is another possibility.
Also, I realized the price I was seeing for the PSB Synchrony at around $2000 for the pair is far too low, I can't even get it used for that much for a pair so that is my mistake. I should have mentioned the PSB Imagine to fit the price range.
So it comes down to
PSB Imagine $2000 vs the Canton Vento 870DC $2700 vs. the Sierra Towers $2000.
*And since no one really owns the Sierra towers, it's really comparing it to the sound of the Sierra-1 bookshelf since they claim it will be very similar.
What I found from Stereophile for the PSB Imagine