pezking4

My g/f and I have encountered a few times over the past months where we have felt uneasy at night and have discussed the possibly purchasing a handgun for protection purposes. I'd say it's mostly for peace-of-mind, and would stay out of sight 99% of the time.
What are some things I need to think about when chooses a handgun? How do I know I really want one (I do have a small child that will be growing up in the house with it). I've fired weapons at ranges before, and have learned to respect them. Right now, I just figure I will teach my son at an early age to do the same, as well as taking every measure to ensure he never comes in contact with it when he gets old enough to explore.

Any input is welcome, thanks guys.