AWCherry,
I've seen a few posters already mention it in this thread, but I don't think you've acknowledged it - what about the CM9? It is 95% of what the PM9 is, at half the cost. I have a CW9 and a CM9, and they have both been 100% reliable. The only things they lack from their more expensive P/PM counterparts are polygonal rifling, dovetailed front sights (although they are still replaceable), an extra magazine, nice rollmarks on the slide, and machined slide stop. None of these things has been an issue with me, especially considering the price cut you get.
Even though the CM9 pushes the "comfortably pocketable" envelope for me, it is doable. Anything bigger would be out of the question for me, and the Shield is bigger. I've never shot or even held the Shield so I can't knock anything about it.
I like the Kahr trigger. It does take a little getting used to if you've been shooting 1911s or Glocks exclusively. But it really is smooth and light. Just a long reset.
Anyway, take a look at the CM9 if you haven't already. The money you save over buying the PM9 will buy you plenty of extra magazines, a holster and ammo.