Well then, for ammo price and LOTS of practice you can't beat the Glock 19 or the longer and higher capacity full size model the Glock 17!
The major significance of the Glock 17 is that you can practice with WWB and such and then use Speer Gold Dot Hollow Point in 124 plus P or Ranger 124 +P+ and get almost 357 SIG velocities out of the long polygonal barrel.
