Check out BladeTech holsters. I use one of their IWBs for my GLock 23, they work a lot better than the Bianchis for the heavy semi-autos. Just a little harder to use as you must thread the belt rather than clip on.

IWB is the way to go unless you're a big guy. I have a paddle holster too, but I could never actually conceal a gun with it. at 150lbs and 5'10"