GJH77: Thank you very much for that answer.

From my research and the help here, it looks to me that the 40 would be a no brainer, due to the facts I could always purchase the barrel in the other calibers. Currently I have an M&P9 FS and love it. Its functioned 110% and thats the reason Id get another.

The reason for me liking the 357sig is I love the 357 magnum, but wanted that same power (comparible to) in a semi-auto.

Does anyone have any information on the 357sig round specificlly?

Thanks all!