Searching for the most "accurate" speaker (below 15K)


I’m looking for the most accurate and resolving speakers (budget is <= 15K). Paradigm Persona 3F, Kef Reference 3 or Focal Sopra 2 are some of the options I can think of. Any opinions on how these compare? Should I had other options to this shortlist? The amplifier is the (absolutely extraordinary) Nagra Classic AMP.

Thanks! :)
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@willemj : totally agree with the dsp ... I've played a bit and it really seems to be the way to go! and yes: speakers cannot be too big and I'm affraid the Sopra 2 may be a bit too much for the room ...
@vermeer Glad you also like the Focal house sound. I know Sopra 2 is not going to get you to the level of Magico Q, but it should be a good match for your electronics. I went through a different path of upgrade. I upgraded my speakers first and found the deficiency of my amp; then I upgraded my amp. BTW, my room size is 20x14x10 (LWH).
If you really want accuracy/transparency I'd second the large, active studio monitors like ATC.  The really big ones are +/- $20k, so budget accordingly.  They also make a bunch of models at app $10k, $15k and $18k

You could also look at some of the less expensive models from companies like Genelec or Focal.

Just bear in mind that not all source material will be flattered by these speakers.  I use powered  Yamahas and Dynaudios in my home studio, but I listen to an Ohm/Rythmik system for playback.
Accurate speaker is a broad area . To  my taste the new 
Martin Logan Renaissance Loudspeakers from the powered Dual Bass 
 with 24 bit - DSP and room correction  from mid Bass on down 
Is the first time I have heard seamless accurate Bass in a Electrostatic Loudspeaker. Which gives the performance like a live venue very accurately 
And the transparency is spectacular. This new series is by far the Best ML 
Has ever done as far as top to bottom using Quality parts with midbass to low bass fully adjustable 
After the room correction.  Your opinion on accuracy may be in other areas.