The question is how big and how expensive, I have this one, got it from Dicks sporting goods, I only paid 550, I bet if you can wait till around christmas you will save a lot. The thing that attracted me to it is that its waterproof. Im more worried about water damage than fire but it protects from both.
STACK-ON TD-28-SB-C Waterproof Fire Resistant Gun Safe | Factory-Express.com