really, safes like this one ( and really any safe you find new for under a grand ) can take less than a minute to open with crow-bars and such. Even safes that have a fairly good reputation still have laughably thin steel, when you compare it to how thick they are designed to look.
The Liberty Centurion, which seems to be a pretty popular and respected option, has an MSRP of $900, but the steel is less than 1/8" thick.
If you have really valuable stuff, step up to a Brown safe or something of that calibre.
Be wary of any safe that doesn't put the thickness of the steel front and centre, as it's really the most important parameter. Forgo the internal hinges, extra bolts, fancy relockers, etc, just make sure you get something with thick steel.
http://www.brownsafe.com/categories/faq/SBG_Gun_Safes.html