I vote G43 or Shield with Travis. I've always used IWB leather for my G36 but I'm going to try the Vedder Light Tuck or the G Code Eclipse for my 43.

You can carry a G19 or G36 IWB but sometimes it's nice to have a smaller option like the G43. That's where I would start. I seriously doubt I'll need more rounds than I will carry in the gun and extra mag. I'm not starring in an action movie.