Top Guns in Terre Haute should fill your eyes! Guestimating 700+ pistols in the cases.
Went for the first time Thursday...got on their SIG 365 & Ruger PC Carbine lists.
If you have an operational alarm system in your home...add a door sensor to the safe/gun vault door.
These sensors are usually hardwired zones or many alarm panels support wireless as well(though placement inside a full-metal enclosure may inhibit the wireless RF transmission).
My gun vault...