High value, giant killer speakers?

Audiofool1....no joke about those Amphion speakers. They are actually somewhat popular in the pro audio world as mix and some mastering speakers in recording studios. I see them all the time at my music instrument trade shows and in some studios.

another speaker that will blow away consumer speakers is Barefoot Audio. These like the Amphion speakers are self powered and have become one of the top rated recording studio speakers. They are accurate, detailed, wide listening sweet spot.

Quad 57’s

Harbeth 40.2

Stax ear speakers

Usher DMD Mini Dancer 2 w/pr of Rel subs.
Avalon Eclipse w/Pr of Rel subs 

Vandersteens - all of them. I honestly prefer the 2s to the 3s, even though the 3s are more accurate, and the 2s with a pair of the subs over the 5s, for the same reason.

2s are a bargain classic, but I like the later larger models which have better tweeters as well as what is basically a subwoofer built in. My 4As have stood up very well and the 5s are just a refinement of them, in a sense, and should be available used now for a decent price (c. $7K)

Check out Seaton Sound and JTR Speakers.  Both offer extremely high performance speakers and subs at prices that are a tremendous value compared to many of the main-stream and boutique companies.