As an ex employee of Mosler Safe Co., I warn you about what is sold as a safe. Most "safes" are safe from fire. In the wall or free standing, they are very easy to "peel" the door. They are known as Records Safes. If you ever watched the series on buying storage units at auction you would have seen how quickly the new owners opened them. The doors are thick, but thick with fire insulation. Many user would put the combination on them so the burglar would not destroy it, but it usually had records and petty cash.
A money safe has at least 1/2 steel walls and door. You would most likely not find them here at an affordable price and they must be transported by experienced people. The best defense is to not keep valuables in your home.