If you carry appendix, give G-Code Incog or Phlster Access/Skeleton a shot. I have both and use them regularly. A thorough comparison of the two here. I've previously tried Alien Gear before I decided I much prefer appendix carry. Alien Gear is a good deal for its price.
Between the Incog and Phlster, it was basically options & belt clip (Incog) vs. simplicity & belt-loop (Phlster). Both are comfortable (no sharp edges), accessible (adjustable for full grip), and safe (retention and trigger guard protection).