Used speaker for 5K

Hi, I’m looking for a used speaker in the 5k range for a 70 sqm room.
I do not want a new speaker because the break-in torture.
I listen to classical, ethnic and jazz only.
I’m looking for a speaker which is able to render naturally the matericity of the music instruments. Brass instruments have to sound like brass instruments i mean metallic. Strings have to sound sharp and the texture has to be rendered clearly even at lower regions. Voices have to breath and be airy. I know that the piano is difficult even from the recording point of view, so let’s forget it for the moment.
The sound stage has to be precise, big in orchestras and small in chamber music and with correct music instrument placement.
Aesthetically i would prefer to not see the speaker at all but since this is not possible i would like a discrete appearance. Size is not so important if the design is discete.
I do not play music very loud and i do not care to much about powerful bass. I only want to enjoy small to medium ensembles sounding lifelike.
The closest speaker i know that sounds like what I’m looking for are the old Dynaudio Contour 3.3; they only fail wen rendering the texture of the lower octaves of cellos, the texture is missing.
I have two alternative amplifications which i do not want to replace: Linn LK 240 monoblocks or a Krell 400xi.
Thanks for your ideas!