The Kahr K9 is actually significantly smaller than the P239. Still a belt holster gun, though. With the 239, you have the DA/SA transition to deal with. On the other hand, the 239 is very accurate. The K9 has a very nice, smooth trigger, but it is quite a long stroke. The 239 feels top-heavy in your hand. The K9 does not. Both are good guns. The P9 has had some teething problems. I might wait on the that one a bit.
M1911