Audiolabyrinth, the 67000 are improved bottom to top. Bass is much clearer, tighter, more resolved, mids are more resolved, smoother, focus is tighter, that's a very quick description.
I have several non-JBL speakers, all quite expensive speakers, each the top of those companies' ranges, so this is no JBL "fan boy" post.
I don't know your JBLs, so can't comment. WC65 Mustang's quote was humorous, but who is he to talk? Tell him is 65 Mustang is just a Ford Falcon with a different skin! LOL WC!