Best speaker on used market around 10,000.00

Curleyques, what ever happened to Primus Audio Pleasure in Kansas City? That was a great place.

I always liked the JM Lab Mezzo Utopias.
It has a large soundstage, tight bass and nice mids.

I would suggest the Avalon Eidolon Vision. It may be a few $k more but well worth it.

My first choice would be one of the Tannoy Prestige series, if a pair could be found. My second choice would be the Vandersteen 5A.

Vandersteen 5As, no doubt. They are phase-copherent across the band, use excellent drivers and design, and the powered-bass system is EXCELLENT for definition, power. and extention...as in below 20Hz. The bass system is also tuneable to remove most of the peaks and valleys from 120Hz down that occur in virtually all our listening rooms.

At c. 87dB sensitivity, they do need power, but that's easy--merely connect them to a pair of McCormack DNA-750s.

I sure do love mine...both the 5As and the '750s...and can't imagine ever replacing them.

http://i89.photobucket.com/albums/k220/jeffreybehr/Room/2012Sep18_tripoded_1200w_zps82dd0efb.jpg
.