Another Kahr fan here....I went to their armorers school a few years ago on a whim, just to take a break and get away for a few days (yes to Worcester Mass- The party Meca of the east coast. I know, I don't have very high expectations). Turned out to be a great time, I learned a lot, met some nice folks, and after touring the facility and seeing how well the guns are made I really developed an affinity for them.
I also like the trigger pull on them. If you've never tried one, do yourself a favor and get to a gun shop that will let you finger-fornicate their guns and dry fire one a couple of times. The trigger is kinda long, but very smooth, especially for a semi-auto with a "striker release" type of trigger.
I personally prefer the full size polymer guns, they are a little taller and longer than a sub-compact Glock, but are much easier for me to shoot than the Micro series. I have big mits, though, so your results may vary.
As far as the cost is concerned, you can get them relatively cheap on Gun Broker. I've seen the PM series with night sights go for around $400 or so (used, of course).