I have been a Sig guy for some time now. I Just purchased a Sig 239 9mm. I have dropped from a Sig .40 to the 9mm. I hope it was a good move. I dropped calibers due to control of the 9mm better than the .40. I have always felt shot placement was more important than the size of the round. ( I do have limits, I wont drop under a 9mm.) Any suggestions of a good personal defense round. This is my primary carry weapon. Second question, do you think a +P round is necessary. I'd be interested in your feed back.