I bought a vault door from Smith Security three or four years ago when we were building our new house. I can't recommend them, not because I'm dissatisfied with the door, but because when I had an issue, they initially tried to fuck me over.
About a year after moving in, the lock (an S&G dial that they offered at a price premium) appeared to have failed. I contacted them and was told they weren't standing by the lock because it wasn't their "standard" lock (no shit, I paid extra for the upgrade). After persisting with them, the owner walked me through troubleshooting it and discovered it wasn't the lock, but a slight amount of settling occurred with the door and the bars weren't lining up perfectly with the holes. Once that was addressed, everything worked again like it should.
However, their early insistence that the lock wasn't covered because I asked for something different than what was "standard" really, really pissed me off. It took a while for them to even be interested in finding out what was going on with the door/lock. That's why I cannot recommend Smith Security. The door itself is everything I was looking for, but the service/company behind it is very lacking. When you spend $6k on a product, you at the very least expect the vendor to immediately want to know why that product failed even if they won't stand behind it. Not with these guys. It took way too long for them to be interested in what may have happened. By then, the damage to the customer/vendor relationship was cooked.