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

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.

Interesting that Dave hears more detail from the Persona than the ATC. The ATC is commonly used for mixing, where that’s of paramount importance. For my taste, ATC is probably more detailed than I prefer for home hifi use, since half my record collection is mediocre sounding, but that’s a different kettle o fish, altogether. The Persona certainly sounds like it would be worth an audition.

Dave

ATCs don't sound bright at all to my ear.  It's just that many pop and rock records (a fair bit of what I listen to) are splashy (at best) and ragged/awful through the presence (not uncommon) to totally screwed up overall (sometimes).  I prefer something with a gently falling treble response, which isn't ATC

To be clear, I prefer a specific type of inaccurate speaker, which isn't to suggest that anyone else should.