I've been checking out gun safes for my basement, and I'll probably get one soon. But what about securing a specific room with a steel door? The room where I keep my guns is actually a corner room with only one way in. You could not break into the room by smashing through the horsehair walls on either side of the door (house was built in 1892). To the left of the door, in the wall, is a chimney, to the right is a linen closet. The windows in that room are small and could be easily secured, plus they're on the driveway side of the house and very visible.
Anyone have any suggestions or experience with interior steel doors?