As someone mentioned, what are you planning on doing with it?
Glocks are great guns because they are dirt simple and very reliable. Plus they come in several different frame sizes. However, they are automatics and to be good with one requires some practice.
The S&W 9's are also a good choice.
I wouldn't buy the Berreta unless you want to spend more money and have large hands. The grips have been known to feel uncomfortable to those with small hands. Especially females. (which is why the Glock is a good choice).
If you're looking for a home defense weapon that you don't think you'll shoot much, buy a revolver. Go get a Taurus or S&W in .357mag. You don't have to worry about arming it, just point and shoot as they say. Plus you can get different frame sizes easily so you can find one that fits your hands.
Now here is my biggest piece of advice 
I don't know what your experience level is with weapons. (I've been around them all my life and have competed in combat pistol matches locally) If Alabama has a concealed weapons program I'd take the class. Most of them are very informative about the care and feeding of handguns. Especially about the laws and for those who haven't been around them much.
One of the main things about even thinking of using a gun in self-defense is being confident you can use it safely (for everyone your not using it against). That confidence can often be the difference in a sucessful use and one you read about (you rarely read about the sucessful ones.)
