All of those are excellent platforms. I carry a G23 due to the fact my agency approves the 22, 23, and 27 for carry on duty. However, that being said, 9mm ammo is cheaper, and overall a little less snappy. A good SD round in a 9mm will more than do the job. The p239 is a nice platform but, only single stack and limited in capacity. I would recommend the G19 or G23, and a good quality IWB rig and gun belt. I regularly conceal mine in a tshirt and shorts/jeans, with nobody the wiser.
Welcome to the forum, from WV...I have friends in Savannah.