Buy the SIG!
Seriously, I have a 229 in .40 and I love it. However, I have had that pistol since 93' or 94'. I have since decided that after shooting all of them for several years that I prefer the 9mm and .45 better. The 9mm is defintely more controlable and for CC that's important, as I know that I can almost surgically place my rounds on target. The .45 just requires less rounds to do the job, period.