I am looking at the Kelteck PM-9 as well and my friend has one and loves it. I have handled and shot it and am going to buy one. The Kahr is an excellent pistol and I would choose one over a Keltec but I cannot talk myself into spending that much more money for the Kahr, very pricey! The keltec is a very functional, reliable pistol at a very afforadable price. If money is not an option I would go with the Kahr but I am sold on the Keltec.
I've got the p11 and a Glock 36, As you can prolly expect the G36 wins hands down, however if funds are tight and you want a reliable pistol the P11 is a great weapon!! I've carried both, (OWB holster)not a big difference. I like a 45 for Pers. protection