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

The best I’ve ever heard...and i’ve heard a lot, was a $2,000 pair of AudioNote speakers.  I think the ANe model.  This was set up in Tyson’s Corner (DC area) in a place called Deja Vus audio.  I believe he rebuilds older amps but could be mistaken about that.  Anyway, I can’t honestly say these speakers were better than any others, fiat there was some nasalness, if thats a word, and a small amount of breakup that some would fault.  They were connected to a $100,000 Audio Note amp which I’m sure provided most of the magic.  But the sound was glorious.  Never heard anything closer to live than I did that day.  Vu ( the store owner) was gently proving me wrong in my opinion of speakers being the most important part of the audio chain.  He succeeded with this demo.

i agree with everyone else that the biggest disappointment I have ever heard is McIntosh speakers.  I would add to that list Bang and Olfsun. Granted they are more of a (life style) speaker, but I really wanted to love their Omnipolars.  The MBL’s are simply amazing at creating a soundstage regardless of where you are in the listening room (the whole room is the sweet spot). I was hoping the B and Os would come close for much cheaper, but was hugely disappointed.  

Of course, I’m sure some people love McIntosh and B&O, they are just not for me.

Over-rated -
Avalons - Flat, Boring, makes all music sound homogenous
Martin Logan - I really want to like them, but the sound on more complex music always loses it's cohesion

Under-rated -
Dunlavy (RIP) - people always focused on "cheap parts"The Living Voice - Amazingly fluid

Most underrated Klipsch RP-260f without a doubt.

I must agree with those who consider the Golden Ear products overrated.

They get a lot of mileage and street cred from the great sonics of the folded ribbon tweeter, which is superb, producing great clarity and detail resolution, which also adds to their great soundstage and imaging... BUT (there’s always a but)... their mids and bass are veiled and do not possess the same dynamics, speed, texture, clarity and detail resolution... say as... many of the underrated speakers such as: Proac’s, or Legacy’s (especially the Aeris and Focus), or ATC’s, or Tannoy’s, or JBL’s, or Linkwitz Orions / LX521’s, or Quad ESL 57’s (divine when properly set up and amped), or even Maggies, or my little known favorite... the Wavetouch Audio Grand Tetons / Anteros (true giant killers).

Now... this is all in the context of 2 channel acoustic, jazz, classical, country sounds (i.e. guitar, piano, double bass, cello, violin, sax, trumpet, brushes on cymbals, etc., etc.).

Avanti1960s list - perfect!
under Joseph Audio.