I'm looking to buy my first 1911 here soon. I can't figure out what the huge differences are between the SA loaded, mil-spec and the range officer? Which one is the best choice for a first 1911? It will be used as a range gun, home defense and I might start to carry it. I'm a lefty, but I'm not too concerned about having an ambidextrous safety. Wanna kill these ads? We can help!