When did I have a fixation about relating the cost with sound quality of amps and speakers? Class A amps usually do cost more, because they require significant heat dissipation aa bunch of other technical reasons. My preference for Class A amps goes back to 1998 when I purchased a Creek OBH-11 SE Class A headphone amp, that was better than any headphone amp I have every heard (unfortunately it finally gave out early this year). But I would probably never buy a Class A speaker amp, because the watt per dollar is not usually worth it.
My new headphone amp is a Schiit Magnius that costs $200, and in Balanced mode, is very accurate, with very low distortion (in measurements I have seen on this website). I very much like the way it sounds. Shortly before I got the Magnius, I had previously purchased a Singxer SA-1 Class A headphone amp that supposedly also measured flat with very low distortion, but IMO placed an obvious veil over the music. I took a $200 beating on the SA-1 selling it on eBay. So it is clear to me (no pun intended) that measurements are not the only thing that matters when it comes to amplifiers. But I "generally" don't believe that things like high-end cables, network switches, etc, make any audio difference.
I certainly don't equate cost with accuracy in speakers either. The best speakers I have ever heard are very expensive, but some other very expensive speakers I have heard are fairly colored in sound to my ears, and not particularly appealing to me. I own a pair of PSB Synchrony 2 speakers that I purchased in 2009, and I think they sound very good.
I don't know how this whole conversation has progressed to discrediting the listening test opinions of Audio Excellence. It almost appears that some people are saying that the S400 must be good sounding because it is only about $2200 a pair, or that the ones tested by AE were likely defective, or all kinds of other crazy reasons. I just accept the fact that they didn't think they were in any way special and not up to the hype they heard about them. But AE probably would not like my PSB Synchrony 2 speakers either, and I don't really care.