You will get many and wide ranging responses. All safes, regardless of brand, or features are there to buy you time. Be it from fire damage or two legged. Some safes are much better than others, but all safes, even the ones the price of a car can eventually be popped. A key beyond the safe itself is access, meaning limiting a thief's ability to get access namely to the hinges, sides, top, back, etc.
Anchor your safe to the floor. Preferably a cement slab. That way you make it so they cannot tip it over to gain access to sides, or to gain leverage on the door/hinges. A couple guys with a dolly can roll even a full safe right out the door if not anchored. It's just a big range bag at that point...
Install it in a corner, Cover the sides or build the safe into the wall if possible. Again this limits access to sides, top. Better yet if you can recess the safe in a bit (Be aware it can limit how far door opens) so that thieves canot gain access or leverage to the hinges.
I am not saying you can be fine with a $100 stack-on folded metal box, but that with proper install a entry level safe can be made much tougher to gain access into. Buy the best safe you can afford, but do not fail to buy yourself a safe because you cannot afford the best. I did that for a long time and thankfully I was plain lucky we never go broken into.
Also, GO BIGGER I heard it a million times, and bought bigger than I needed, but not with any plans to expansion. AR's take 2-3guns worth of "capacity rating" easy, and scoped riffles take around 2.
Also plan on and get a safe with a power intlet built in. You WILL want lighting and a dehumidifier in there.
