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

Man! Thanks for all the input! I'm planning on listening to several of the speakers mentioned (Wilson, Vandersteen) and I've had several of the others. It's interesting how upstream components and the room have incredible effects on speakers etc. (as does "taste"). Originally I was trying to find the greatest value at this price point in the used market (given the different depreciation rates of various equipment and the relative stability of performance in the electronics realm vs mechanical).  Part of the staying power is of the former is value and part is reputation. I was wondering about secondary manufacturers who were producing nearly the quality of the big boys and faced a radical drop-off in the secondary market rendering these speakers a virtual "steal" given the drivers, cabinets etc. Some speakers hold their value quite well (i.e. B&W, Wilson, Vandersteen) others decline more rapidly  (but I think the sound does not decline at the same rate). I was hoping to capitalize on "your alls" experience and find a value speaker that tooks a great hit, but sounds really incredible and it's used price is actually undervalued given it performance. 

It's similar to a situation I faced with a boat purchase, A few years ago I bought a new runabout for 26,000 and now the same boat new is 45,000. Folks have found out it's a good boat and have bid up the price. I don't want to pay the inflated price!

Thanks again folks. Keep suggestions coming!

Magico S5 MkII

"Tooks" let's try "took" a great hit.

Personally I'm very concerned about what direction B&W is going in. They were just acquired by a two year old Silicon Valley tech company this week and it could be a boon for the high end, or it could hurt it as they are the largest and most well known (main stream) speaker company.  

Room is the most important part of the listening equation.  What I love about the Vandersteen Quatro on up is that they have a built in sub woofer/amp system where you can fine tune your speakers from 100hz down to your room.  It works and works great.  That way you can place your speakers in the best spot to do what you want them to do, or you can put them right up against a wall and still get great sound.  I just put a large plant right next to the speakers and I have a quilt on the side walls do I don't get that first reflection.  I also have a stack of albums on the rear wall to diffract the sound waves.  The Vandersteens use a couple of technologies to eliminate the rear sound wave from the drivers so you don't get smearing of the sound wave from rear reflections that you get in many other speakers.  The rear firing tweeter in their 5 and 7 are ONLY there to make some happy with 'ambient' sound.  It's not for serious listening at all.  He has to sell speakers, so he has the ability to turn it on ONLY if you think you need it.

The room is crucial. Fortunately I have a really good room (once I resolve an issue with the floor joists - I have to run a beam in order to cut the span in half and stiffen the floor). So I really suppose the question then is independent of room - IOW's assuming an ideal room. I didn't know that about the Vandersteens.