I have a Liberty, but I must say the "advertised" capacity and "actual" capacity don't jive unless you stack your guns in like cordwood. Figure on bolt guns taking 2 spaces, and add another space to that for a scope. Any AR type guns with pistol type grips are challenging as well, as they don't like to stand upright very well.
I guess what I'm getting at is to get one bigger than you think you need, because you will need it. Also, DON'T FORGET A GOLDENROD if you don't want mildew and rust.
Cabelas, Liberty I think makes them. I don't know how big, but heavy. Friends that carried it to the basement say it goes with the house. Bolted to the floor so a disgruntled burlar doesn't get tempted to turn it over.