Enter your text ...Yes you have the amplification covered quite well.
Just get busy auditioning different brand speakers and that's it. Yes 20 yrs does make a difference. Especially if driven hard. I did a lot of research a while back and bumped int a company that makes a machine to measure cone breakup using laser dopplar. I also bumped into a company called Accuton. They make the kind of quality I think you are looking for. I didn't look any further because the speakers are out of my league. Your amp has the power, now you have to get a no compromise speaker that can handle the signal. Get the checkbook ready.Can't wait to see what you end up with.