Just picked up a Stack-On 10 gun safe today. Hundred bucks at Dick's. Bolting it to the closet wall tomorrow. Just my 870 and tons of ammo in it now. USP lives in a pistol safe bolted to the bedframe.
I think having the guns locked up while no one's home is the responsible thing to do. I'd hate to surprise a burglar and end up looking down one of my own barrels.
Also, if someone ever stole one of mine and used it on someone, I don't know what I'd do.