i ordered the biggest safe containing the most fire lining available from pella security. it is truly a safe safe... they cost money, though... i gave $2600 for mine... in retrospect i'd do it again.
when buying any safe i can honestly say the following:
buy the largest safe you can. you
WILL fill it. the only regret i hear from any safe owner, is the fact they should have bought a larger safe...
regardless of what you buy, keep in mind that your purchase can be completely tax deductible. if you keep your tax documents in the safe, its purchase is completely deductible. gotta love my CPA...
now that i have a big safe, my wife keeps more stuff in it than i do. she keeps all the photo negatives in a mini fire safe inside the big one. our house may burn down but we'll have all our pics.
and guns...
septic tank