I'm going to take the opposite approach of most others who have posted. I think your primary concern, first and foremost, should be stopping power. You don't get something for nothing. The only way to accomplish low recoil is by taking away power.

It doesn't matter how easy a gun is to shoot if the person you shoot with it doesn't go down. And I've seen enough videos of liqour store thieves getting shot and not going down to believe this happens a lot.

Find a gun that will devestate your target, and then practice with it and learn to control it.