Funny, I've been looking at carry guns lately too. My brother in law has a Ruger SR9c that is very nice, and I've heard the LC9 has a similar feel. Right now I'm really liking the Nano that the local store has though.
I would say that your ammo options are several times better with 9mm luger over .380, and almost non existent with 9x18mm. Definitely make sure you see them in person before you buy. Even if you can't shoot them, get a good feel for the size before you buy a gun to carry.