I've been running a Raven Eidolon with a Blade Rigs clip the last few months and it's become my new favorite holster. The clip makes it extremely versatile, the holster disappears under a tshirt for me, and it's very comfortable. I love being able to quickly remove the holster and also to wear the holster sans belt if needed. This holster also has the soft pad like thing on the inside which forces the butt of the gun into the body for added concealment.
If your looking for a nice quickly removable set-up this would be something to look at.