I have a pair of Meridian 500 which uses vifa drivers and 4th order crossovers. I blew out the diaphragm of the tweeter D27TG-15-06. I can replace the diaphragm. However I want to upgrade them to dx25tg05-04 or xt25tg30-04. I bi-amp them with Rotel for the tweeters and Denon AV 3801 for the bass drivers. Any recommendations?