as much as I’ve read about the Extremas, if it were me, I’d be hard pressed to sell them
having owned Olympica III’s, and based on reviews and comments re: the Extremas, it sounds like a couple of sonic characteristics are part of the SF house sound: 1) big, wide, deep holographic soundstaging which provides an immersive listening experience, 2) a natural, relaxed (for lack of a better word), engaging sound quality that includes detail, image specificity, instrument and vocal spotlighting, yet doesn’t wear one out at higher volumes - they are forgiving speakers that have a knack for making most anything sound good
the craftsmanship, materials, and architecture of SF speakers is unmatched IMHO; I am of the opinion that most speakers are just not very attractive, period: robots, stands, huge draperies, metal boxes, obnoxious horns, exposed drivers, multiple drivers, alien looking things, etc., but….SF speakers? I can look at them all day long