@emergingsoul I have always used one amplifier to drive my speakers. My Thiels and my new Dynaudios only have one set of binding posts so biamping is not practical. My approach has been to focus on one really good amplifer rather than biamping but like everything else in this hobby it's a matter of personal preference. If biamping is required to optimize the vocals in a particular speaker then I would avoid that speaker because there's just too many variables to deal with. I would rather spend the money on an amp and speaker that work together to provide the best sound throughout the frequency range.
Regarding the dealer experience vs. the home experience I can easily say that my home listening room is far better in every respect than the dealer's room in which I heard the speakers. I'm fortunate to have recently built our dream house with my dream listening room and I'm thrilled by how good it sounds. As I mentioned in my post, I've run REW and can say that it's not my imagination. The test results are really good. I'm going to carefully add some treatment to make the room better but I could live with the current sound no problem.

