Theft of unsecured displayed guns is almost guaranteed. I live in a very low crime rate area, but would never display my guns.
The problem is that people will see your goodies, and they will talk and discuss what they've seen. Sooner or later, the information gets to someone (or someone's kid) who needs cash quickly. What could be an easier mark? Just wait for the driveway to be empty and the house dark...
Besides, every stolen gun that's used in a crime is more ammunition for the Aunties. We owe it to each other to keep our firearms safely secured.