I have a friend here in Vegas with the AER BD5. It is an insanely expensive driver ($45K/pr) but the sound is incredible. I need to add that is is augmented in the bass as it is on a 200hz LeCleach horn but absolutely stunning regardless. I have never heard a single FR driver sound that good. Everything else has some issue somewhere. If you do not have the budget or equipment then you have to accept some compromise somewhere.
