Here's an informational video that will at least help you generate some good questions. It's brand-specific, but look past that and absorb the information presented. GUN SAFES "THE TRUTH" weaponseducation - YouTube
Beyond that: Consider bolting the safe to hard structure (like concrete floor) mandatory. The "soft underbelly" for a lot of safes is their floor, which may be defeated by sledgehammering once the safe is tipped over.
A friend and I both got safes within a couple of weeks of each other maybe 3-4 years ago. Different brands of safes, but both came with the convenient S&G digital keypad locks. BOTH locks failed within a week of each other. I got lucky and eventually was able to open my safe; he wasn't, and his old lock had to be drilled out. Both safes now have the conventional, mechanical dial-tumbler locks. Your mileage may vary.