For me in the urban environment I live and work in, I'd have to go with the Glock 17. In my area, the 9mm is the most available, after .22 it is the most affordable round to practice and plink with, while at the same time the Speer Gold Dots 124 Grain +P make for good self defense ammo. The long sight radius makes it lethal to shoot at longer distances, and the recoil allows me to get back on to the sight picture quickly when seconds count.