The V-Line Top Draw is 12" by 9". You could simply draw that out on a piece of paper, then see if your weapons would fit within that square.
This is a pic of my Sig 239, Kahr PM-9, and my girlfriend's .357 Lady Smith inside of a Top Draw:
http://img.photobucket.com/albums/v627/a1abdj/DSC00384.jpg
The big difference between the Handgun safes, and the V-Lines, is that the Handgun safes use thicker steel plate. All of the big gun safes that everyone here stores thousands of dollars worth of collections in don't use steel that thick, so it's really not needed just to protect one or two pistols. The V-Lines also cost a little less, since the manufacturing costs are lower.