If a .22LR pistol is a good trainer for trigger discipline, and the Kahr trigger takes a bit of training and practice to master, isn't a .22LR Kahr a no-brainer?
in the absence thereof, is there a good alternate that doesn't cost more than a Kahr (I'm talking to you, S&W. And you, Ruger!)
Charter Arms revo? Bersa Thunder 22?
Or just spend that money on ammo instead and enjoy life? I never quite got the ".22 is fun" memo, a gun is a gun, to me. They all take focus, concentration, and money to shoot well.