Right now you have a couple, but more than likely it will grow. Buy one big enough that you can grow into it. You can always keep knives, blades, swords, axes, etc in it not to mention your mportant documents and jewelry.
Firesafe is good too, but if you find a good deal on a non-firesafe you can do it yourself with some sheet rocks, insulation, and carpet. Just a thought. Remember firesafes are generally rated for an amount of time at a certain temp.