I always say that the bad guys will hear two noises, if they don't leave after the first, they won't be leaving after the second.(If I'm home that is)
I'm sure you are aware, with the gun laws in most state, that would more likely land YOU in prison. The burden of proof that deadly force was absolutely unavoidable is very high. I was considering a Beretta Xtrema2 "security system" before the ELK...until I read the gun laws