True.
I guess that I believe that perhaps being a Christian don't mean that you can somehow stop at a certain point and say "hey, I am prepared to follow the Christian Code this far but not any further" - as you mentioned you were prepared to give away stuff but not actually endanger yourself.
Then you would opt for potentially killing the intruder - a shot to the groin could hit the intestines and lead to a fairly quick death if unlucky. At the very least you would opt for potentially mutilating the intruder.
Look, I apologize if this come across as judgemental. My point is just that maybe being a Christian isn't easy. Going for the gun might be your instinct. But is it really the Christian "solution"?
Aren't people bending Christianity to fit their lifestyles a whole lot these days, be it homosexuality or a case like this?
I'm just saying.
Sorry for the OT. 
Oh, I agree w/you... being a "good" Christian in other people's eyes that would follow, act and react in each way that the bible teaches is actually pretty much impossible...but I see your point..it is something for which we should strive.
And yes, I believe a lot of us bend it to fit our lifestyles but what makes someone a Christian is their belief in Christ as Savior. Yes, we would hope that we can live better lives but I don't think this negates us from being justified in defending ourselves or others (even w/deadly force if need be). He doesn't want us to be reckless about this type of thing but I think He wouldn't mind if we were prepared to deal w/the situation.
Luke 22:35-36
Then Jesus asked them, "When I sent you without purse, bag or sandals, did you lack anything?"
"Nothing," they answered.
He said to them, "But now if you have a purse, take it, and also a bag; and if you don't have a sword, sell your cloak and buy one.
Sorry for the OT. 
No problem! ... what is OT?