Dude!!!! For that kind of money you are getting into some serious electrostatic territory. Have you tried electrostatics/planars? Here are some examples in your price range (prices in dollars):
Sound Labs Millenium 3 - maybe 7 - 12k? Note that they may not make this anymore. They've eliminated several of their 'lower' models.
Sound Labs Millenium 2 - maybe 10 - 12k? I'm sure they make this one.
Note that I'm pretty sure both of those have treble attenuation, so you can chage the highs to your delight!
There are many that say that Sound Labs are the finest speakers in the world at any price.
Magnepan 20.1 - 11/12k?
Again, this is a speaker that many will claim gets as good as is available these days. If you look through lists of 'best speakers ever' this is basically always on the list.
Quads - I have a slight preference for Magnepan 20.1 over Quads, but these are the most famous of the planars and of great historical importance.
There are also the Roger Sanders systems, this one is 12k
http://www.sanderssoundsystems.com/10a.htm
He has a very small sweet spot, but these are amazing inside it.
If this is all overload, just try the Magnepan 20.1s - those will be the easiest to hear in any major city. With Pass Amps (that is what I have with a maggie one level lower than 20.1) you will be in heaven. The Magnepan 20.1s also have tweeter attenuation, not quite as fluid as the Sound Labs (for Maggies you add a resistor to the system) but you seem comfortable with a system that is light on the highs all around - with the Sound Labs you could change it whenever/as often as you wanted to.
And note that the Sound Labs attenuation is NOT a graphic eq - it has to do with the way the speaker is fundamentally built, so it does not degrade sound. You can read about it at their site or on planar fansites, there is much info on SoundLabs on the net.
If you can't hear them, just assume the Sound Labs are a bit better than Maggie 20.1s - although some might argue differently.
Before buying box speakers you *must* at least listen to the Maggie 20.1s. And if you've heard 1.6s that will give an idea, but is not the same. 20.1s add true ribbon tweeter and a push-pull design - very different.