My candidates:
1. Henk's modded Apogee Grands, in Netherlands - USD 100k
2. Western Electric 16A with subs, GIP drivers, Leipzig...Asia too has a few of those - USD 50k
If you can afford it, get both...Apogees down the room, WE mono on the Long wall
Then, more commercial, available, serviceable.
1. Trios with bass horns if you have a big room
Smaller rooms, big budget, no particular order
Stenheim Alumine 5, based on Munich demo. USD 50+, good for those looking for Magico style cones
Horns Autotec, only horn I heard that fits into a average size room nicely. Euro 25k
Best Value:
Acoustat Spectras, if you can find them used. 2k. Remains one of the best rooms I heard, to go over that, I had to visit people with serious room, vinyl and giant speaker set-ups
If you cannot find those, Quad 2912. Live with the compromises, but on vocals and small scale classical you will have it covered.
Special mention to Tune Audio Animas, which fit into Trio with bass horn category. They have better tone and timbre though, trio has better imaging, scale, bass.
Also you can take any cone and cross it over well to subs.
For those who cannot make the investment to serious rooms, vinyl, and big speakers, recommend MCH rather than going the 2-ch route if classical is your thing