rmdmoore makes some great points.
I have a pair of Cornwalls in a room about the size of yours with similar intent. They are big speakers! And they do a terrific job of filling that room with energy and wonderful sound.
A couple of weeks ago, I swapped out the Cornwalls for O/93s. The Devores sounded great, but they lacked the...jump of the Cornwalls. I'm not talking about volume. I like the sensation of being "in" the sound, and the Cornwalls do that better in this bigger room, a room in which I have music playing a great deal of the time, not because I'm doing "serious listening," but because I like it.
The O/93s are fantastic speakers. They have detail that the Cornwalls just don't (for me), and I love nothing better than plopping myself down in front of them.
I like a lot of the stuff you like. I'm Zu-curious, particularly for the Soul 6. Volti looks very interesting. I think if you've got room for a big speaker, I'd look at a Cornwall or something similar (Volti?). This opinion is worth what you paid for it. And I never mentioned my low-level envy for your F8.