I don't want to derail the thread, but I'm surprised no mention has been made of the various other cartridges that attempt to combine the "best of both worlds" between high capacity and low stopping power in FMJ vs. low capacity and high stopping power in FMJ. There's plenty of these, from the .40 S&W, the .357 SIG, even the 10mm Auto, and these are just the ones with diameters between 9x19mm and .45 ACP. I'm somewhat partial to the 10mm auto myself, but its military use has been extremely limited. Search this page for "sirius" and you'll find it:
http://www.specialoperations.com/Foreign/Denmark/
I know pistols, being secondary weapons, are largely an afterthought in military operations, but I think practicing more often with them can't hurt. After all, if you were in a bad situation and had to rely on your pistol, you'd want to be damn certain you could make your shots count.