You really can't go wrong with any of the ones you mentioned. Like other people have said, you need to try them out. If nothing else, at least get each one into your hands so you can see which one points the best for you. Your hand will fit each one differently and it should be easy to find the right one. Reliability is so high now, (more a function of improved ammo designs than improved guns) that you can pick any of the top manufacturers and be sure that they will cycle well. That being said, you still need to fire a bunch of the ammo you plan to carry so you are SURE that it cycles. Don't get caught up on having to shoot Hydra-Shok's (my personal favorite) or Starfires or any other style. The main thing is bullet placement and feeding reliability. Under the adrenalin pump, be sure to aim just a little bit above the belly button as people under stress have a tendency to shoot high. This will put you right at center mass.
I don't own one, but if you want the most idiot proof and durable gun of the ones you mentioned, get a Glock. It is almost as easy to shoot as a revolver. From what I read about the tests the military did when they were replacing the .45, It was the most durable one of the bunch. They just couldn't get it to jam or fall apart. The only reason they didn't decide to use it is that it doesn't have an external safety. We wouldn't want a gun that our troops could actually fire now would we? I worked in an old style gun shop for a while. When most people came in to get a pistol for self defense, I usually talked them into a revolver.
Personal defense gun fights don't last much over 2 rounds so you really don't need all that fire power. (I will be the first to admit that it is comforting though. The old "better to have it and not need it...") The revolver is a lot more "idiot proof" than any pistol. They used to be way more reliable too. (That gap has narrowed so much that it is hardly worth mentioning.) I'm not sure what your experience level is, but if it is relatively low, I highly recommend you get a revolver in .357 magnum. It is the most lethal round out there, and you can train with .38 special ammo for less money and recoil. Miami Vice and the rest of Hollyweird did more to popularize the semi-auto's than probably anything else. Most people are better served by a plain jane Ruger sp or a similar Taurus.
Speaking of Taurus, the gun that has me drooling is their Titanium PT145T. A .45 that is 10+1, weighs 17.3 ounces, and fits in the palm of your hand. The best thing about it is that it has second strike capability. We have a lot of different levels of knowledge here so I will explain that. With most compact autos, if you have a dud or misfire, you have to rack the slide to reset the trigger. You can't just pull the trigger again. The Taurus Millennium is striker fired, so you can pull the trigger again and hopefully the second strike will make the round go off. That feature doesn't matter at all on the range, but when your bacon is in the pan, it could save your life. I really like the innovative stuff that Taurus is putting out lately.
Take care,
Jim McCullough
------------------
Next time you feel your life is sooo tough, read this-
Some American Heroes