Like Jim I like leather, something about 1911s and leather just seem to go together. But good quality leather is going to cost a bit more. I have actually switched to Kydex. I have not had any issues with my gun flopping around and I do all sorts of activities while wearing a gun. My favorite is a 5” 1911 in a Raven Phantom, which I believe is now discontinued. Before that I used the leather Wilson Lo Profile. The holsters are actually very similar other then material from which they are constructed. I switched to a 4.25” Commander sized 1911 and carry that IWB in a Comp-Tac MTac or OWB in a Bravo Concealment brand holster. Really any kydex 4.25” 1911 holster from a reputable manufacturer would work. The secret is the belt.
Yes Belt is very important. Here is a IWB Galco Horsehide I have carried for over 35 years. Comfortable and comforting to wear. Note smooth side to gun, 1 3/4 re enforced double 9 oz leather belt. Growing up carrying a Model 29 for 20 some years, I never warmed up to the gunwriters that said.....I wish they would make aluminum frames and lighter guns. Perhaps for carry and never shooting I can see. I have watched the industry lighten guns, cheapen holsters, go to web belts and add sweat guards along with no lining at all along with improper care and feeding which results in weakening the leather. I guess they have never been around professional tack care. I know, I know....dying breed.