If you can step up here, I think you will regret. The Sasha's give you more of everything. Wilson has a lineup here for a reason.
Now they all sound great. And better ancillary's with sophia 3's vs current gear with Sasha's is another route. The Sasha's will be a little less forgiving of other system weaknesses. Is your system page up to date? Some bass traps in the corners maybe, do you have better power cords?, what about a better transport? Cables...etc Those Sophia's are good, they'll let you hear it all...
I have heard the Sophia 3 and Sasha's numerous times at my dealer....same set up.