Wilson Sophia III vs Sasha

Excellent move Ricred1.. Good to know. Congrats and enjoy 'em!

Ricred,
If you could stretch your budget a little, I would recommend to getting the Sasha (anchor first) then build system/room around it.

Earier this year, my brother was staged to buying the Sophia3/REF110. It was practically a two months back-forth affair to the dealer--whereby their demo system too slowly evolved. Finally, after gotten used to sound of Sasha driven with the then new ARC REF150, he blew his budget and went for it--Along the CD8 and REF5. I found that this synergy to be very well complimentary and sounds real good. So much so, that I got the amp for myself too--and I'm not so much of a Wilson nor an ARC fan prior.

Another option to look at also is probably trying out the REF150 first in your current set-up. I would guess that this move too would push the performance envelope of your Sophias quite a bit further, positively, much in ways that you prioritized. Good luck.

Ricred,
Just took a re-look at your system page. Your room (new?) looks kind of bare. Which in this case, yes--basic first, the many suggestions to doing room treatment first would seem to be most logical/justifiable. Only after that's been properly addressed, then the 'anchor', 'support' and 'tuning' parts would make more sense.

Ricred,
Re my initial suggestion to getting speaker first is none other than that from previous experiences, different speakers usually do require different treatments--optimally.

If modular units--still ok, you might just need to add, subtract, or simply move them around. However, if fixed/built into room--then not so easy, more headache should you later decide to switch speakers. Hence for me, whenever possible, always better to get a fixed on designated speaker first, then specifically treat room around it. As in your case : what Sasha requires might differ from that of Sophia's.

But at the end, either ways, whether it be room/speaker first--some corner bass traps, front wall, and sides' first reflection absorb/diffusers are basic essentials which will definitely reap benefits in almost any room.

Also, if you go modular--your ears, with some dealer's help (basic measurements) can do, no need Rives etc. Only if you plan on built-in ones incorporating some sort of room re-design, then those pros will come in handy, ime.