Greysmoke;
Your cost per protected cubic inch of space ratio goes very steeply down, the larger the unit you buy. The other side of that is, of course, that it goes very steeply up when you buy two smaller safes.
At some point you'll have to determine what cost/benefit ratio suits you best. However, once you can see a true safe as opposed to an RSC, I believe you'l be less hesitant about having everything in one unit. There is a Graffunder safe dealer in Garland Texas, they are: The Safe Company, 614 Easy Street, Garland (972)272-9788. Keep in mind that even the Fort Knox is an RSC. U.L. rated safes are entirely another proposition. The cost of them is more than RSC's for good reason, but is frequently less than what people are lead to believe. If you do think you might want to investigate getting a proper safe, please feel free to PM me here.
900F