I think I remember reading that the speakers should be at least 50% of the cost of the entire system. It was a while ago, but it mentioned that speakers don't really wear out before our ears get used to and bored with them. After 20 years of this hobby I was finally able to do that, it did make more of a difference than I ever thought possible and I am only up to Wilson Audio X-1 Series lll's. The next step is the X-2's.
Todd
Todd