what speakers to buy

My vote, of course, would be the Spatial Audio M3 Turbo S speakers and pocket the difference from your budgeted funds.  Revel F208's would be in play too and are stunning in appearance.  I'd urge an audio of the SA speakers... open baffle speakers perform in a way that box speakers can't.   Just my two-cents worth.  Lots of great recommendations from the folks about, no question.   

Here are some suggestions that have not been mentioned yet:

1. Audio Physic Avanti V 
2. Aerial Model 9's
3. Rockport Mira I (The last pair sold on Audiogon went for $4700!)

Others have mentioned the Wilson Sophia II and Eggleston Works Andra.  Amplifier matching notwithstanding, the are both good choices.  My first choice would be the Rockports though a little hard to find.

A second for the excellent Avanti Vs. I think (memory fails at this point) the Andras went lower.

@gdhal 
No, I haven't heard the Reference model. I think GoldenEar are pretty good speakers for the money they're asking, but their entire line sans the Reference model largely targets Focal's 900 series line. My rubs with the GoldenEar products are their tendency to vertically comb a bit and the nature of AMT tweeters in general. AMT's are extremely flat way up into the rafters of their range and that adds an unnatural, though ear-popping, sparkle to them, regardless of how well behaved they are. They tend to be more forward sounding and that leads to them leaning the highs further forward than the midrange. Lastly, I don't find their dispersion to live up to the technical claims. Finding the balance with AMT's between depth and width is a much more difficult struggle than it is with other transducers. Beyond all of that, the Focal 936 is widely noted for it's brutal transparency and sensitivity to nuances in music and gear; a fact that attracted me. It also measures extremely well. And finally, the width, depth, and accuracy of the 936's imaging is absolutely top notch at any price. Much of that has to do with the tweeter producing a better integrated sound with the midrange; a point where GoldenEar's do have struggles. 
And you want to tell me that their Reference, which uses yet another AMT, competently competes with Focal's 1000 series, Sopra, and Utopia lines? I'm not ready to buy that jazz. AMT's are great drivers, to a point. I probably won't own another pair until I hear a pair that are less directional than the many pairs I've already owned and heard. That's the main reason I own Focals. 

The Focal 900 series is decent but I could see many people choosing GE and other similarly priced offerings from the usual suspects like Revel and Dynaudio over them. We stopped carrying them at the shop for just that reason but I was sad to see the 1000 series and up go. The AMTs in ELAC and Audiovector sound fantastic. I went from Focal 1008 BE to Audiovector SR1 Avantgarde Arete and it was the better speaker overall.