Greetings, I was discussing it "being time" for my first gun with a friend of mine and was asking him about a "1911" model he could recommend. Being the wise and good friend he is, he asked many questions and reminded me of some things I had not thought of. (costs, ammo, cost of ammo, easy of handling, it being my first gun, etc. He then told me to "hold on" and went to "get something." He came back with a Caracal F QS and a 4th Gen Glock 19 (he has quite the collection). The irony is that he bought the "F" with QSs the day BEFORE I visited! As far as feel, comfort, and purchase (for me), there was no question that the Caracal fit my hand perfectly. I was dumbfounded how easy it was to acquire and hold target(s) with QSs! So here are my questions. Btw, PLEASE keep in mind this will be my first gun and will be for "Home Security" and possibly some IDPA in the future. SIGHTS: Are QSs the way to go? I have read that accuracy dissipates with distance, but given my primary use, I don't imagine 25+ yards will ever be a high priority, at least for now. Furthermore, most people said that if something were to go bump in the night, it is going to be a point and shoot situation. Something I had NOT considered was going from a QS to another kind of sighting set-up on a gun in the future. Any thoughts? SIZE: I think the "F" is the way to go for me given size of hands, accuracy, and I don't see myself carrying at my level of experience. CALIBER/LOAD: Ok, I am gonna swallow my pride here and plead ignorance. 9mmx19 and 9mmx21. Are these BOTH options or are we relegated to one given the states (midwest here) or is it use? If I have a choice, which is better? Finally, any other things/issues I should be mindful of, I would greatly appreciate it. Already signed up for classes, so we are good there. If there is a national training certification course people recommend, I would appreciate them sharing it. Thanks for your time and attention!