I just took my concealed carry in Arkansas over the weekend. Sent my paperwork off yesterday. I'm looking at getting a full sized handgun and a smaller handgun for conceal carry when the full size is too large. I've shot several handguns and I'v decided on Smith & Wesson M&P. I've also went to a IDPA match and spectated and really want to shoot in some IDPA matches to practice some defensive situations. So.... With all that said, I'm thinking of getting a M&P 40 S&W and then getting a Storm Lake 9mm conversion barrel for the IDPA shooting, since that ammo is cheaper. That way I can practice with the same handgun. I do realize I'll have to purchase 9mm magazines. I do like the idea of having a 40 S&W for defense and the 9mm for IDPA and practice. My question to all of you is should I get the 40 S&W and spend the extra money on the barrel? Or should I just get the M&P 9 and be done with it? Also I haven't had a chance to fire a 40 S&W, so I'm not sure on what the recoil differences are in a full framed M&P are. What are your expert thoughts?