If you are really looking at an automatic, you might want to save up just a little more money and get a Kimber. They make a great pistol with lots of extras at an affordable price (compared to what you have to pay for a custom pistol with the same features).

But, if you are possibly still considering a revolver, I would very highly recommend a S&W model 66 (.357 magnum). It is a very sweet shooting gun and you have a tremendous variety of ammunition you can choose from. Shoot .38 Special wadcutters at the range for $6.50-7.00 a box (shop around), and load up full house magnums for defense. These gun hold their value very well, and if you look around you can probably find a good used one in the barrell length you prefer. I have one from the S&W performance shop, and it is my favorite gun to shoot these days.

Best of luck whatever you decide! This is not an easy choice.