A move from Harbeth to... Wilson?

Great room size. Great Amp. You really have to listen to the Sabrinas.
The Harbeth you have would go nicely with two REL s/510.
The Sabrinas are very different then the Vintage watt /puppys.
Very transparent and open. If you listen to them you will decide quickly if they work with you.

It’s your system. Go for it if that is what you want.   It’s all good stuff. 

 For investment in that league, would make sense to listen more widely before making the jump. Consider Vandersteen Quatro Wood CT at substantially less cost than Sabrina X. Sound to my ears is more lifelike than Wilsons.

Geoff won’t like this but i had two 60-90 minute demos with the Sasha Daw in Manhattan this past July and found the $37k speakers too dry and clinical to my ears. Although on the plus side great soundstage, imaging and super clean as I could hear every lyric (which is a problem for me as I have asymmetrical hearing loss), it just tired me out. It had no soul to me. Meanwhile I wound up with the Harbeth 40.2 Anniversary and absolutely adore their warmth and natural sounding musicality. Vocals are liquid smooth.

Wow, thanks for the great comments and discussion. In answer to a few queries, I do love the Harbeth "sound" - the natural midrange and overall true timbre. (I'm a musician, and timbre is my #1 concern in any speaker and system.) That said, I have found the Wilsons to be less analytical and clinical that some have suggested, and similarly natural and timbral-accurate. I don't necessarily think they're a complete dichotomy, but perhaps I'll reflect on that a little more.

To address what I don't like about the Harbeths, that would cause an upgrade "itch" to be scratched? It's hard to say - they do from time to time sound a bit "boxy" on big, orchestral stuff. But overall I have no complaints, just... an itch for something different, maybe? Complacency = first world problems! :)

And I think my room is probably a limiting factor for the big Harbeth 40s, though with the overwhelming consensus on those, I may do look at those calculations again. Moving up the Harbeth line does make sense, I just think that's too much speaker for this room, but perhaps it could work? Hmmm...