I had a Liberty safe that I used for about eight years, and I really liked it. Eventually my collection just outgrew it, by a lot. At the SHOT show I saw Pendleton safes and thought "this is what I need", but their turret options were not right for my collection.
After some consultation with them back-and-forth they came out with what they call a "split turret" that can accommodate long arms on one side of the carousel and carbines on the other. They also have triangle cuts in the "index" shelf that can accommodate larger muzzle devices and oddly-shaped firearms. Then I finally pulled the trigger (so to speak)!
The safe arrived about 4 weeks after I ordered it. I went with the biggest model, all optioned out, with the tough bedliner-type external finish. It's got lights, a built-in dehumidifier and fan, and electronic rotation.
Since it's round it fits neatly in the corner and I have it flanked by shelving. It weighs 1200 lbs. The best thing about it is that I don't ever have to remove more than one rifle to get another one out. And I can SEE the WHOLE collection all at once! Standing with that door open and watching the turret spin around is mesmerizing.
It is EXPENSIVE as all heck but I am VERY happy with it so far.