I've had a lower end Sportsman Steel safe now for about 15 years. I've used the heck out of it and it has been just fine. I would buy another safe from them, as they offer some things that many of the other safe companies don't. They offer 1/4" steel bodies, which is what I am interested in.
I'll take the 1/4" steel bodies, and if I have to shim a shelf or two, I won't fret over that.