Bass Pro Shops has a decent safe for about $699. Fire rated, very secure, and holds lots of guns and accessories.

If that's more than you want to spend, you can get what they call gun cabinets. Stack-on makes a couple that might fit your needs, but they are not considered "safes." Not fire resistant, not heavy, but they do lock and are hard to get into.

If you have the money, get the safe, if not, a cabinet will do for now. Bass Pro Shops carries both. I think the cheapest cabinet is about $99.