Buy something that is too heavy for 2-3 people to move without equipment, other that that use a shoebox. Anything light can be easily carried off and opened later so you might as well go without.
Can you put in a floor safe or bolt something down to concert?
-C
Actually my main concerns are sticky-babysitter fingers as well as keeping a pistol in my wife's office and away from the kids. We might bolt it to the foundation or the house's framework though.
We only keep a little babysitter money on hand, and on occassion have a few checks and the like that need to go to the bank.
A large rifle fireproof safe is on our '07 agenda, and it will be too heavy to carry off and bolted to the foundation in our new house.
I just saw this on the 'net I like it
http://www.handgunsafe.com/wall_safe.htmor this
http://www.handgunsafe.com/401s.htm