Warm romantic & detailed

Shahinian Obelisks.

How about Spatial M3 Sapphires open baffle as an alternate speaker to consider? Check out New Record Day review to get an idea of whether these may be what you are looking for. 60 day return policy if you decide they do not work for you. Plus 92 db efficiency.

+1 on Tannoy
+1 on Sonus Faber

The Mac/Tannoy or Mac/Sonus Faber combo is tops so maybe sell your current speakers and don't look back.

-1 on Furman Elite reference... I had the Furman it reference 15i and found sound noticeably better when amp was plugged into the wall. YMMV. Now have a AudioQuest Niagara 7000 and notice no difference when amp plugged in to it. A 3000 or 5000 would also do the trick. 

Also using a Sbooster for a Lumin T2

I was looking for speakers a couple of years ago in that same general price range and auditioned several including Focals and Sonus Fabers . My favorites fit the description of what you’re looking for. Aerial 7t’s are just sublime. I have since purchased a Mac MC 452 and a C47. They are in a room with significant treatment. The focals were too bright for me also and the Sonus at the same price were no match for the Aerial’s. 

I had a similar issue with my old Mirage M3-Si speakers.  I was considering a couple of the Focal speakers but again, a metal tweeter is not what I wanted.  I really liked the Sonus Faber signature sound and came close to making that purchase.  However, I made my decision and recently took delivery of the new model from Dynaudio, the Contour 60i.  A wonderful soft dome tweeter that is very detailed but never overly bright.  And the midrange is perfectly forward, yet balanced, and never harsh.  Vocals, wind instruments, string instruments all sound so nicely balanced and natural.  A real pleasure for long listening sessions.  They play very well with all sorts of music genres.  And when you ask them to deliver on high volume with Classic Rock music, they excel. The Contour 60i has some improvements over the preceding model, the Contour 60.  But the differences are not night & day.  If you can find an authorized dealer who still has the Contour 60 remaining as a floor demo model they can be had for a very reasonable price.  I have recently seen $6,500 to $7,000 posted for those demo speakers at several dealer locations, Nationally.  Anyway, the sound quality is my opinion, of course.  But I wanted to share that I had the same issues as you and was able to solve them by getting the Dynaudio speakers.  Best of luck to you.