For my medium sized handgun collection, I keep mine in a Frontier Underbed Safe. I picked mine up locally for about half the price in the link, but it was the only one I could find.
http://www.ebay.com/itm/Frontier-Und...item4ac355af3b
What I love is that I can tuck this under my bed, and with a bed skirt, it hides the safe beautifully.