Safes are more complicated than meets the eye.
First you need to examine what you're going to put in it, and the value of its contents.
Second if you're talking about a typical safe, consider room to grow. I bought the biggest thing I could get in my door, and I could use a second on the same size, and even then i sill wouldn't have room for ammo in it.
Fire ratings are not all created equal, Know the time and temp of the rating.
Understand what the gauge of the walls are, and the gauge of the door. Composite safe doors are deceiving. They might look an inch thick, but they are two layers of sheet metal, say 10 gauge or whatever. A lot of cheaper models use thinner metal in the door. A solid metal door that is 1/4 steel looks much thinner, but is much heavier than many composite doors.
Be weary of a summit that begins with sharing bread; for the sated man is at his weakest.