On my short list... 9mm ccw...
http://www.berettausa.com/nano/
and review:
http://www.youtube.com/watch?v=VXxpkM7q_2E
It is tough to select given I want to hold and shoot prior to purchasing.
I'd ignore the caliber religion wars. We just had two knuckleheads here in NH (if I remember right) dispatch each other, one with 22LR, one with 9mm, both seem to be dead.
Maybe we over think this. If you buy one of your choices, and turn out not to like it, or carry it, sell it and repeat. Downer somewhat, but the up side is you get to turn yourself into an expert on the ones you've owned. Ha.
Good luck.