Because your stocks, important papers, tax records, deeds and titles are of little monetary value to a thief and, therefore, need little theft protection, your biggest concern should be for fire protection.
For the protection of valuable coin collections, jewelry, cash and hand guns you should consider burglary protection as the most important security need.
With the proliferation of personal computers and magnetic media that all data is stored on, safe manufacturers have found that record safes that have adequately stored written materials for years do not adequately protect the magnetic storage media of today. Most safes are rated to an internal temperature of 350 degrees for one hour, a temperature that would destroy magnetic media. After much testing, it was determined that magnetic media should not be subjected to temperatures above 125 degrees Fahrenheit.