Monitor speaker that will stop the Quest?

Sonus Faber Guarneri Mementos.

Double that .... Sonus Faber Guarneri Mementos

APL Hi-Fi Gravitas NB-1 , I'm done!

Harbeth SHL5s

Raidho Ayra C-1.0 - indeed, as Kiwi_1282001 put it: a truly brilliant pair of speakers.

I just received my pair today, taking over their "little" siblings, the X-Baby MkII Ceramic. I never imagined the step-up in sheer musical insight to be this pronounced, but believe me, it is. The whole frequency spectrum seems tightened up with more speed, resolution, lack of restraint, cohesiveness, dynamics(both micro and macro), clarity, background quietness(almost eerie), fluidity, soundstage stability and dimensionality, etc. etc. The overwhelming sensation of being presented with a musical truth, this right-ness, is awe inspiring and places me in a purely receptive and attentive mode. I'm sitting in my sofa a late hour past midnight and can't get myself to part with hearing yet another piece of music; it grabs hold of me, pulls me in.

You wouldn't know it walking into it, but once you hear it, it suddenly makes sense...