Spend some time looking at test results here:
The caliber index is on the left, and it's very easy to navigate. You'll see that the 9mm Rem. Golden Saber performs as well for penetration and expansion as anything else in a larger caliber. These are the two key measures of pistol caliber performance.
I stand by my Glock 19 in this category of guns, ONLY because it is invariably reliable. There is NOTHING more important. For that reason, if I were looking at S&W, I'd go straight to the M&P. In testing, the gun lasted for 53,000 rounds before the slide cracked. Glock is king in that realm as well, but people like different things....