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
Given the last several months listening to them, I vote for the Avalon speakers. ...but save some cash for a good cable to bridge your amp to the speakers. These speakers reveal every flaw upstream, so eventually the cables will demand being upgraded ;-)
Sell your amps to add that equity to your funds and buy the biggest ATC's you can afford. Rarely will you see them used since their owners never sell them, one you've reached the top.....?
Hi,  I just watched a YouTube video of the linkwitz lx521 speaker's,  and the magico s5, wow!, wasn't even close! , the lx521 was rich, organic,  extremely real,  man! , I believe these are for me,  I have a lot of questions, hope many of you can help me, instead of useing 3 pairs of speaker cable's per side,  couldn't I have long jumper speaker cable's Daisy chained so I can use my highly modified krell 700cx 2 channel amplifier? 
I will mention however that Electro-voice has been building sub-woofer's for stage use with the same woofer design in a cabinet for the last 20 year's,  it's a bass horn!, that is exactly what the bottom half of the lx521 is! , cool with me,  I was a professional musician most of my life,  cerwin-vega and JBL first invented the horn bass speaker system's decade's ago, so some of this design was borrowed from the mentioned of this post .
You really need to hear anything by Acoustic Zen. I also like Raidho, but they are rather expensive in comparison.