Best $10-15K bookshelf speaker?

Marten Parker Duo

Absolute best sound speaker - Wavetouch audio Antero speaker.

Compare Antero sound to Magico A-1, Focal Sopra No. 1, TAD Me1 below

Alex/Wavetouch audio

     Antero

https://youtu.be/LlYlIvmmg3c?si=EB_m8Mi5PRDD2vcJ&t=152

    Magico - Jay’s voice is perfectly natural. So, this is honest A1 sound.

https://youtu.be/iLQMNJi8JAs?si=7V-pIRiieDqu1_1B

    Focal - People’s voice sound great in recording. So, this is real #1 sound.

https://www.youtube.com/live/Msaq4kCYclw?si=lJMZFA1mufR9DUxM&t=830

    TAD - Accuphase + DCS.

https://youtu.be/aAWLLMladgM?si=VMZwsUfb4R99zRCR

Gershmann  & Diapason  are definitely on my short list 

I guess it depends on your amp as to what would work best.  if you are considering a higher efficiency bookshelf, try the Triangle. I think it runs about $9k.

Joseph Audio Pulsar 2.