The size wouldn't be a problem since I replaced a pair of rather large PBN Montana EPS2s, which my wife prefered to the Wilsons, probably due to the wood veneers. She truly hates the look of the mod/industrial Wilsons. Now I am very happy with the way my Wilsons present recorded music but would consider something that provided sonics at least as good as the WP8 with better visual appeal to make my wife happy. Considering the price/performance level we're discussing, that move would have to be substantially better than my WP8s.
Most people, but not all, prefer the Sasha to the WP8, and you've heard the Sasha and Scala. It sounds like you easily prefer the Scala to the Sasha, so maybe not a lateral move. But as I said earlier I was pretty impressed with the relaxed delivery the Scalas provided. My wife (important factor, as I don't have a dedicated music room) and I also prefer the looks. If I make any move, it will be to the Scala.
BTW, there's a dealer selling the new Scalas, on the net, for around $20k ! Now thats a pretty good deal. I guess theres some profit in this speaker at roughly $31k retail in the USA!
I'll keep you all posted.