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.