I am looking at getting one of the 3 fallowing: Glock 19 XD .40 or 9mm M&P .40 or 9mm I am going to be using it mostly for concealed carry and target practice that comes along with getting used to the gun. I am 6'4" so I don't think I will have a tough time concealing a decently sized pistol. I am curious what is the overall strengths and weak points from people that have used those guns. Whats to like? Whats not to like? Is one of them better for lefties? Please help, I am very new to the shooting community (This will be my first gun purchase) and I am hoping to learn from the experiance of others. Thanks.