JBL lovers

Can anybody help? I have cam 200s and cremona auditors,very nice sounding,but does'nt sound that great on classic rock. I am thinking of trading for mc 60s and vintage JBLs. I have never heard a vintage system,will I loose all the detail and seperation that I hear now.I think my system sounds to nice,but has some good sounds that I don't want to give up. JBLs have big woofers will the bass be out of control? Which JBLs are highly sought after and are the ones with what I think are horns in them "the ones with the louvers" the way to go?