"Absolute best" used speaker for $8-10K

Very subjective ....do you want great sound or an elegant speaker with a gorgeous wood veneer in a cool shape? There is a mix of suggestions already in both camps.

Queanh74,

I have not heard the Eidolon model but Avalon make great speakers The drivers cost about $1600 retail in total which is pretty expensive compared to what many manufacturers use (you would be shocked at the low cost of primary components in some very expensive speakers). The cabinetry is also beautifully done and hard to make because of the angles...so you would get some good workmanship for your money.

However, you should definitely audition these at home as they have an unusal baffle and this may make the dispersion quite complex...room interaction and your listening position might be quite important compared to other speakers. My guess is that the sweetspot will be small but imaging will be very precise.

You mentioned a preference for female vocals/jazz. Diana Krall "The Look Of Love" won a Grammy for Best Engineered Album in 2002. I believe it was mastered by Doug Sax on ATC SCM 100ASL's. These speakers are currently listed on audiogon used for $7500 obo.

Not necessarily the "Absolute Best". Seriously, can any speaker claim that title when so much depends on room acoustics and aesthetic needs?

Given you plan to spend that much money, these speakers have a heritage in pro use that should give you more confidence than the all too common glowing audio magazine review or web testimonials from people you don't know.