Best 40 to 50k used speakers

Id look for a pair of Von Scwweikert VR55 Aktives. Retail 60K I think. Should find used in your price range. Excellent adjustable bass, best tweeter that I have ever heard. I own them and all who hear like them.

A new pair of Wilson Audio Sasha DAWs will far outperform any used speakers!!!!!

@thieliste The Magico A5 has excellent price/performance with Herculean internal damping. At $22k it competes with $30k+ speakers.  

+1
The A5 made a much more expensive Wilson sound like a boombox.
Even the dealer that was trying hard to sell the Wilson to me had to agree.  

JBL 4350 monitors. Restored of course.
Now you know where my head is at.
https://twitter.com/garnishmusic/status/305413240509304832

If you were actually thinking about Wilsons.

Regards,
barts