What used speaker would you buy with $20,000-$35,000 and why?


I'm closer to the 20,000 part, but if I get stretched i would like to know higher recommendations. Remember, this is on the used market - not retail. I'm even interested if you think I should make a huge jump (say to 50,000), but I want to know what justifies that jump. I'd like the best bang for the buck and even the worse bang for the buck. Are there speaker lines that are totally overlooked that sound wonderful in this price range that I need to be exposed to? I may go higher, but lets start there.

PS Let's just assume the upstream equipment is adequate to drive any recommended speaker. We are not limited by upstream components.
Ag insider logo xs@2xnab2
nab2     01-26-2016 10:17pm

Before I pull the trigger on this I'm fixing the room dynamics (in part by stiffening up the floor and removing the carpet). It's a near perfect cuboid, but the structure behind the walls and underneath the floor is lacking (listening room is in part of the old house).
Can you clarify what a "near perfect cuboid" is, and what its dimensions are?

Regards,
-- Al
 
Just FYI, there is a pair of Sonus Faber Amati Futura speakers in Red Violin for sale on Audiogon today. The price is $21,000. This is one of my favorite speakers in a drop-dead gorgeous finish. If it doesn't appeal to you I have no more advice to give you.

P.S. I have no affiliation with the seller
Al, this is what Cardas has to say about the golden cuboid (yes I left the word "golden" off earlier - saving time):

"The Golden Cuboid listening room is 10’ x 16’ x 26’ (Read 10.000 x 16.18033989... x 26.18033989...

It’s dimensions differ in a Golden Ratio or Fibonacci sequence (5-8-13-21-34...)."
From: http://www.cardas.com/room_setup_golden_cuboid.php

My room is 10' x 16' x 26' but is not not expanding in dimension as one moves out from the short side of rectangular room. I didn't design the room that way. It's the size of the front room when we bought this house (hence the need for some structural support - the floor joists are not sufficiently engineered for a really tight/stiff 16 foot span).