I also agree with the the asymptotic model for audio performance. Even though I might have the wherewithall to purchase higher-end equipment, it has not been my experience that the cost justifies the additional outlay. Perhaps if at some point money becomes totally meaningless to me, my position will change.

In the meanwhile, I have taken the "knee of the curve" (although it can hard to identify on some of these exponential curves that have asymptotic values) as well (see sig).
Boy, I kind of hate to say it, but I recently tried a little [A,B,...n] no-peek testing with my brother-in-law over the Christmas-New Year's break, and what stood out like a siren amongst swine? A JBL speaker set up. I was shocked, and a little irritated with myself with regard to the bias I felt against the JBL. I immediately went hunting for additional amplification, subwoofer changes, and additional speakers, because my bias would not allow me to believe the lowly JBLs could sound so good.
And you know what? Once I knew what they were, and listened to other speakers, they started to come back to the pack, so to speak.
My knowledge of what I was listening to had a direct and immediate impact on my perception of the sound quality.
Ah, the zen of it all...