Unlike Ken, I really like my G23...just shows you how diverse people's opinions can be on the same guns. In this case, however, I would second the recommendation for the G27. It is much smaller than the 229, less expensive, works exactly the same way, and can use the same mags and ammo, not to mention doubling in a vest pocket or holster as a second gun on duty. You have several trigger / spring options to choose from as well as magazine extensions which can allow a little more hand to fit on the grip if needed.
In the middle of an off duty encounter, with perhaps your family along, no backup, no shotgun or carbine, no radio, etc. etc. is NOT the place to try and make a transition from your more familar duty sidearm! The G27 is not my most favorite gun, but I think it's a no-brainer here.