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

I would vote for the JM Lab Alto used for $8000.

If your room isn't too small, used Dynaudio Confidence C4 is right in your price ballpark.

I guess our answers could be a poularity contest,as many of these threads are. My vote goes for the speakers I own: Sophia,series 2. Not any series 2's 4sale,yet. I had the originals and they qualify. Worth a listen,rather than assuming others' 'votes' match your prefereces.

Avantgarde Duo

I'll second Chris #1's vote for the Avantgarde Duo's....... I'm loving mine.

Chris #2