I'd recommend you look into a Sig 9mm pistol. For accuracy, consistency, reliability, etc., I think the Sig is the best I've encountered. Nice triggers, and no dang fool external safeties to contend with either. Cost may be a little more than some others, but consider it a form of "life insurance" premium.
For concealability, check out the Sig 239: 9mm, 8shot capacity. 10round mags are available.
Another good one is the Sig 229: 10shot cap., and twelve shot mags are available.
Both are available in 40S&W if you prefer.
I have the model 239. I practice with Federal American Eagle 115gr. FMJ, and carry Federal Hydra-Shok, 135gr.
Here's a link to the Sig website;
Link: http://www.sigarms.com