Neutral bookshelf speaker

Hi,

I search an pair of bookshelf speaker that are the most neutral, a little warmer doesn't bother me, but don't want boxy sound.

I listen every kind of music except classical music.

My budget is 1500$ for used pair but if can spend less I will be pleased :)

Which model can you recommend me ?

I'm located in France so certains model will too difficult to purchare.

Regards