I carry a couple of guns in different rigs, depending on what I am wearing.
First is my Colt 1911 Officers in a Concealco IWB. This holster worn on my hip really conceals the gun well. I can wear shorter T-shirts with no problem. It is not super comfortable, but not bad either.
Next is my Kimber Eclipse Pro II in a Brommeland holster. This holster is much more comfortable than the Concealco, but it is an OWB holster and the gun is a little bigger so I have to make sure that I am wearing a longer shirt.
I also have a Galco holster that was actually for a Sig, but it holds both my 1911s pretty well. It is the most comfortable holster by far, but it doesn't not conceal as well as the other two. If my shirt rises with the Brommeland you might see some of the holster, but it looks like a cell phone or something. With this one the barrel is the first thing that you see, so you can't let your shirt ride up. Also, this one does not hug the body as well as the others do, so the bulge on the side is more noticeable. But I can wear this holster all day long, everyday, in or out of the car without any discomfort at all.
I also made a planner holster for when I'm wearing workout clothes or no belt. I posted it in a different thread. In addition, I have a holster that I stuff between the center console and driver's seat for long trips.
You can drop a lot of money finding the right holster. I was just lucky enough that a friend gave me the two more expensive holsters. and the Concealco was only $60ish. It also only took 3 weeks to make and ship.