Ptss yes I'm a dealer, once, a very long time ago for Sound Application. It was the every other month call and upgrades that was the down fall. Yes every company does the upgrade path but they don't do it 5-6 times a year and sometimes for new screws that he would charge thousands for. Maybe they were worth it but none of my customers ever thought so.
For $2000 for one of his older Reference units you can not go wrong.
Good luck,
Steve
SOS