Well that just depends, how good a shot are ya? If you can't hit the broadside of a barn then double stack and if you can shoot the wings of a fly then single slim stack, just kidding. I'm decent shot so like a little of both worlds, and I my self prefer a Glock 30, a small frame double stack, that I carry in a quality IWB holster, it goes with me were ever I go. I've toted small and large when it all boils down it is just what you comfortable with both in accuracy, size, and style of carry, IWB, OWB, Shoulder. etc. Good luck!
