What's the best fire box / fire chest to use for document protection inside a safe?

I don't need a huge one, just one to hold a few documents (titles, trust, nfa stamps, etc)

cost is not a concern. fire protection and small size are.

there's quite a few out there:

http://www.firstalert.com/index.php?option=com_flexicontent&view=item&id=1024:294-cu-in-fire-resistant-chest

http://www.sentrysafe.com/Products/15/F2300_Waterproof_Fire_Chest

http://www.fireking.com/adesco_safes_data_mediavault.html

Best reason I know to tell the wife you need a large gun safe!  that helped me get mine....

As long as the one you chose is UL rated your good to go.
And I know at least the Sentry and the First Alert are both UL rated at 30 minutes.
They do work.

Fwiw I use two Sentry 1150's and have them inside my Amsec BF.
I also have a Sentry 4100 chest for less important paper work such as insurance policies etc.
I bought my g/f a First Alert chest because it was on sale at Sam's Club a couple of years ago.

I use the Sentry's due to price.

If money was no object I would use the Fireking for sure.  Unfortunately they are $$$