Best bookshelf speakers <$2000


I’m building my first high fi system after being more of a portable audio person. I want to start with the speakers. Space is limited so bookshelf speakers are a must.

Preferences:
Balanced and revealing with a hint of warmth.
Midrange most important to get right over highs and lows
Timbre is super important - I listen mostly to acoustic music especially jazz
But I do need some bass as I also listen to some electronic music
Smaller is better but SQ is most important
A speaker that sounds good with different amps but also scalable with high quality sources
Wide sweet spot - I wont have money for a great amp at first but want them to be scalable for later

These speakers have caught my eyes - any thoughts on them?

Ascend Sierra 2s - Ribbon = dispersion limitations?
BMR Philharmonitor - See above. Also massive.
Buchardt S400/S300 - Wary of the sudden hype train and limited info
Silverline Minuet Grande - Limited info
Reference 3A De Capo - This caught my eye as a potential endgame speaker if I could blow up my budget a little. But concerns about BE tweeter as well as some potential snake oil stuff (cryogenic treatment (!?)), exaggerated sensitivity claims and wonky measurements put me off.

What else should I be looking at?

Edit: I could have sworn I had <$2,000 in the title... Anyway, my budget is 2k.

stuff_jones
Buchardt apparently took 5402 acoustic measurement points with a robotic nearfield scanner in making the waveguide for their new speakers, fwiw. 

I'm leery of marketing based on fancy sounding processes though. Isn't the ear the ultimate arbitrator of a speakers worth, not the cool technology that went into it? Since SQ is so subjective, it's easy for our impression to be moved by claims of fancy technology ie snake oil. That's not to say R&D doesn't matter (I'm no luddite), but the ends justify the means, not the other way around IMO. 

And at least judging by my research so far, a very good share of the most recommend SQ for buck speakers are smaller companies. Again admittedly second hand information, but these are other peoples ears and I don't see what bias they would have to favor these smaller brands a lot of the time.

As far as a luxury buying experience, that's not important to me. I want a low risk buying experience which to me means trying at home with the option of returning. Also a manufacturer who stands behind their product and I think small companies may tend to do that better in general (they have to to keep their heads above water).
But this is a tangent. I'm perfectly happy to buy from a large manufacturer if it seems like the best speaker for my preferences and dollar and I have  a way to try it.
Fortunately we live in a time where there are many brands of amazing bookshelf speakers for under $2,000.  And if you don't mind buying used, there are many more options.  My MO with most purchases is to buy slightly used and get something high end for a great value.  i think you are wise to get some nice speakers and they will only sound better as you improve your other gear.

I just upgraded to B&W 805's and they sound amazing!  I have been listening to master recordings on Tidal this week and it has blown me away.  I kept waiting for a deal and I got them for $1175 shipped on eBay.  They look like new and sound great as well.   
Used loses you the warranty though, right? Is speaker failure a thing, outside long term degradation of the woofer/supports?

Is there much of a "lemon" risk buying used?