My first consideration for cc is for a weapon that I *will* carry a lot, because the best pistol in the world won’t work if you leave it at home all of the time. You have to be comfy with it.
Second consideration is whether the hammer spur will catch on clothing, or if you should get a hammerless or striker pistol. This depends a lot on what kind of holster you use.
Third is a personal view of mine, that if you are going to cc you should also carry a knife *complementary* to your pistol.
I heard that Ruger was coming out with a striker fired version of the LC9.