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
A broken ankle and a ruptured Achilles tendon have slowed this project to a crawl (no pun intended). So it may be awhile. I do know that I have to go to a few conventions and certain stores in Atlanta. We will see what develops out of this. Thank for all the advice folks. The room/components interaction is indeed significant. I haven't had any opportunity to listen to Vandersteen or various Planar speakers. Both deserve an audition. 

Thanks to all who have responded.  My man-shed (acoustic shed) may be the first item on the agenda!

You have all given me food for thought!
Can't go wrong as Atlanta has some great dealers.  Vandersteen has a top dealer there and they know the products well as long as others.  You should also check out the Maggies and KEF's while there.  All three are so totally different, but musical.  Hang in there and get better.
In an earlier post above, I voted for Avalon speakers on the used market. I want to amend that... I still love my Avalons, but I may have been extremely lucky in terms of the synergy between the Eidolon model I have and the Ayon amplifier I have. 

My point here is: Match the speakers to the amp ...or the other way around. Match the speaker cables to the amp, more so than to the speakers...

nab2,

  I live in the Atlanta area and would offer up a beautiful pair of YG Acoustics Anat Reference Studio III speakers for your consideration.  Retailing at $75,000 I am brokering a pair for an Atlanta area customer for $30,000.  Flawless in appearance and operation.  Knowing more about your room size, complementary equipment and listening tastes would be helpful to know if these might be the speakers that fit your needs.  Audition can be arranged in a dedicated private listening room.

Mike
I used to really like the Avalons. I noticed many of the dealers have dropped them (and the value has gone down tremendously).  One dealer told me that he had to drop them as the new owners won't advertise and he can't give them away.  It's really a shame as they had a few nice speakers, but like Thiel, they aren't what they build their reputation on.