I am looking for a good pistol primarily as a home defense gun. Whatever I end up with it will see a good bit of range time as well since I just plain out like to shoot as well. I have a preference for a gun that is available in either 9mm/.40 so that I can shoot it in both and see which I prefer. The one hang up I seem to be having is finding a good pistol that has manual release safety. I have to have this because I am going to start teaching my 4 year old about guns and want her to have an easy visual for a safety. No I am not going to have her be shooting it anytime soon, but want to educate her about guns long before she actually fires one. Right now my leading choice is a USP 9mm. The other catch is I need it to be 50 state legal as I am in the US Navy and could end up anywhere. Any suggestions? Thanks in advance.