What speaker is the most musical, one you never want to sell?

Quad 57s.  Modified by me ages ago.  Regardless of their shortcomings, I need to come back to them occasionally because they do Real better than anything that I've heard.

I built my GR Research NX-Oticas five years ago, and I've never heard better, at any show or home. Keepers for sure. Assembly takes some time, but it's not difficult, with hand tools and six clamps. They sound best with some room treatment. I also like Acora Acoustics, Rockport, Joseph Audio, Borreson, and Raidho, but no reason to spend that much. Audiogon is fun...some excellent writing  and expertise here.

 a pair of JBL century L100's  with the 123a drivers, when you open them up the driver dances like no other , and I can hear them booming bass  and crisp and clear highs  40 acres away on the ranch.

Soundlab Majestic 645 (three-knob model).   Airy, detailed, and delicate.  A Thiel SS1 subwoofer reinforces the deepest bass notes.  

Was glancing over the responses and most speakers that people wouldn’t want to get rid of are either outdated or carry some nostalgia that they can’t let go off.