Dave, if it takes three trips to transfer your guns from one house to another, and you have your gun dealer in your contact's list, you might be a gun nut. I think you have a ways to go.

As long as you can bolt the safe to the floor or wall, or hopefully both, you should be good. My last safe was a keyed corner safe from Home Depot, many years ago. Made by HOMAK. That would be a minimum of protection level. You can go up from there in security and price.

http://www.homaksecurity.com/GunCabinets.htm