Two considerations to start with... How far do you live from Fire Department response??? and How many guns to you need to secure??
When I'm looking at a safe, I'm concerned about the rating for attack deterrence in minutes... Some are UL certified, some are not...
I live fairly close to the city/county fire station and their response time is going to be about 3 minutes from the initial call until they are applying water...My grand kids live in a rural area and the response time may be 15 minutes, so their fire rating would need to be higher..
Depending on your shooting interests, age, and number of firearms you currently have, consider what your likelihood will be of future acquisitions...and maybe other extended family members (if they don't have a safe, or may pass on in the future...) At my point in life, I've been getting rid of many that I no longer shoot, so that if something happens to me, my wife will have less to worry about...20 years ago, it was a different story..The larger safe allows storage of several without them getting banged together when putting one in and taking one out..
Just some food for thought..