I'm a fan of Kahrs as well, but I find the PM series a bit too small for my hands. I do, however, default to my P9 for caring in shorts, or when I need to wear a shirt without that much billow in it. I typically use a Don Hume rear pocket rig, and keep a spare mag in the interior sub-pocket most of my shorts and pants seem to have.
An interesting side effect of carrying this way way that I had to seriously reconsider where I put all my crap that I carry. Specifically, I had to move my wallet to the other side, which has made things a bit more efficient, and always keeps my strong hand free to draw if need be. Maybe it's just common sense, butu I'm kind of slow...
I also have a CW9, which is cheaper, and a bit less nice than the P-series. The trigger is the same, but there are a couple significant differences. The front sight on the CW is polymer and pinned in place, the slide stop is cast, vice machined, and the barrel is rifled in standard fashion, instead of polygonal. Not a bad little gun overall, but the difference is noticeable to me.