I currently carry a Sig P239 .357 Sig in a Comp-Tac CTAC, on a Wilderness Instructor's 5-Stitch gun belt.
The CTAC is by far the slimmest holster I've found, and is suprisingly comfortable in the right spot. Best of all, I can conceal it in a t-shirt and shorts. (which is critical in Texas :D)
What about you guys?