What are some of the most underrated and overrated loudspeakers you’ve auditioned?

Underrated: Spendor, Linn.

Overrated: Bowers & Wilkins, Goldenear 

highly rated and deserving:  Sonus Faber, Dynaudio, Spendor 

(it’s clear what my favorite speaker brand is, haha)

Right, and sophisticated people know that, but if we always have to state such caveats with every post then forum becomes very boring.

Keep it simple.  Spendor is way better than anything else out there.  haha, kidding of course - no disrespect intended