John Browning was a genius at designing SA pistol ergonomics and point ability, carries are Colt/Para in either 45auto or 38 Super Government; however, it's hard to beat a standard Hi Power with its very slim frame IWB, plus I can use the same Bianchi holster.
For light clothing on the trail, the 38 Super IWB works well as does the 45 auto and Hi Power in town.