I've discussed the point but with a different angle. IMHO the problem comes from confusing "different" from "better." It's also true we get bored, so "different" may be "less boring."
In particular, authors who claim they are hearing things in their music they never heard before are often seduced by signfiicantly different frequency reponse of speakers. Of COURSE they are hearing things differently. Is it "better?"
While it's good to keep this in mind I also think it's good to be true to yourself. If you find yourself getting bored, maybe budget appropriately. Instead of looking for 1 set of megabuck speakers, look for 2 or 3 you can rotate in. You may be happier.

