As a fellow classical music listener, I'd highly recommend the Eidolons (used prices right around $10-12K now) or the Merlin VSM-MX with battery B.A.M. (used prices around $6-8K). With suitable electronics (tubes highly recommended) and front end, both of these speakers will render harmonic overtones, low level detail and microdynamics in very musically natural way, with superb soundstaging. Both speakers are incredibly revealing and will benefit from the best electronics and front end you can provide them.
.
.