It depends on where you live and what you wear to pick the best holster, actually you'll probably end up with more than one. Under a parka and you can wear whatever holster you want. Florida in the Summer? Then an inside the waistband rig with untucked shirt is probably best. Milt Sparks, Galco, Blackhawk are a few brands that I've used.
Lou Alessi at Alessi holsters. The best of the best. Call now and get on the waiting list. I run a CQC/s with my USP compact. Basically I run that model because I'm in Colorado. open carry and concealed carry is fine here so the cqc/s fit the bill for me.
Another vote is for 5 Shot Leather. John Ralston does an unbelievable job as well. I use one of his belts.
I carry a Springfield MC Opderator with 5" barrel in a Kirkpatrick Leather Texas Stong side holster. Comfortable with decent concealment. The holster, with a good belt, handles the heavy weight of the gun which is 43 oz unloaded.