I'd tend to agree with the last few posts. The un-compensated G23 is a very good choice, it's small enough for concealed carry, but large enough to serve as a duty weapon (it's what the FBI picked a few years ago for field agents) It comed standard with the gelded 10 rounded mags, but standard capacity 13 rounders are still available but expect to pay $55 to $90.
And the .40 cal ammunition gets high marks for performance in it's lighter loadings (135 to 165 grain bullet weight)
I've owned several Glocks but the 23 is the only one I still own.
You can't go wrong with the K9 either. This is an extremely well made pistol and their customer service is outstanding. You will sacrifice 3 rounds in magazine capacity, but this is a much smaller pistol especially in the width of the frame and slide making it very slim and flat, a big plus for conceald carry. They are also extremely accurate pistols and have a trigger pull like a very well tuned double action revolver.
If possible, try to shoot each of the pistols you've listed and make your decision on which feels and shoots best.
Good Luck,
Mark / Fl