Stick with the JBL's. I'm not familiar with them, but there's really nothing wrong with vintage audio. You may want to have someone look at the crossover (caps may have dried out) and possibly recone the woofers, and perhaps add a sub to the arrangement, but other than that, I would stick with what you have.

I'm not helping are I? We're supposed to help you spend your money, aren't we? Sorry...

Have you heard any of the current JBL's?