Im surprised to see that nearly all the votes are limited to 2000 dollars. Assuming you have the cash assumes you have the cash to burn. So assuming I had the cash to burn I would spend up to about 20 grand for a pair. There are tons of great speakers beyond the 2k price point that I think you would be serisouly limiting yourself there.
But the Question as asked ".....before you feel that there is a diminishing return on the quality of sound to price paid?"
Do you honestly believe spending $20,000 gets you 10X better SQ than $2000 mains?
I have heard $15000 Sonus Fabers(in a showroom, no A/B comparison) and I couldn't hear that much difference from my M80s.
