Does it exist? A semi-auto carry pistol that (pay attention, this is important) is concealable by pocket carry in jeans and khakis, and works for both OWB and IWB, with enough horsepower to be "comforting"?
Thinking the Kimber Micro 9 or SIG 938 might be the closest. Any other suggestions?
As a baseline I would ask myself this question:
What is the smallest handgun (size and cartridge wise) that I am willing to get into a gunfight with, against an armed adversary/adversaries?