I think it would be helpful in making a recommendation if you would i) take each of the three speakers which you mentioned and describe what you liked/disliked and ii) were specific about what type of sound or what attributes you value most. This would allow someone to make an educated suggestion. It is doubtful even at the $10k price point (used) you will find a speaker that will do everything that you want. The same would probably still be true at $20k.
What is the best USED Speaker Under $10,000
REAL WORLD PRICES
Considering AudiogoN prices - You can buy many fantastic used $20,000+ Speakers for under the magic $10,000 level.
This is really a different topic than previous questions in this forum.
I've bought Avalon Eidolons, Joseph Audio Pearls, Wilson Watt Puppy 6's and others for (slightly) under 10K
I would love to hear from other A'goners their opinions on what are the best you can do - for under 10K (Or even a "little bit more").
Thanks for sharing your opinions!