I have run through SERPA, Safariland, Galco, Uncle Mike's, Bianchi, DeSantis, and many, many others for my pistols. I have never found a more comfortable, better fitting, better looking holster than my current Mitch Rosen
Their holsters are incredibly comfortable, durable, and stylish. They look fantastic without being flashy, or bulky. I can't suggest them enough. The price isn't terrible when you consider that these are hand-made for your individual order. The 5JR with thumb break is one of the most popular holsters they produce, but they can put a thumb break on almost any holster they sell. I have 2 Premiers with Full Detailing (one with a thumb break and one without).
Pair these holsters up with a decent horse-hide pistol belt and you have a very comfortable rig that you barely feel.
As an aside, I'm planning to pick up a shoulder rig from Mitch Rosen in the coming weeks. I'm looking at the Executive Special.