I've considered a 9mm revolver from time to time, but for self defense purposes if you want a revolver and are not comfortable with .38 +P snub nose performance, you might as well go with a .357 Magnum.

The primary advantage of 9mm Luger in a revolver is the speed in reloading offered by:

1) the short, easy to eject length of the 9mm Luger case; and 2) the ability to use moon clips.

However, while with a lot of practice, moon clips can almost be thrown into the cylinder, it works a lot better with round nose FMJ bullets, and is less than optimum with hollow points. In addition, it's a lot easier to carry a speed loader in an OWB carrier than it is in a pocket. Those two things make a 9mm revolver nearly ideal for practical pistol competition, but leave it coming up short for concealed carry purposes.

So...just go with a good short barrel .38 +P load or better yet a good short barrel .357 magnum load.