I'm not calling you out or anything but can you link us all to these threads you're talking about? Specifically the chambering issues that required barrel replacement? I can't find anything like that. I'm willing to bet that 99% of the mag issues you're reading about are from people that haven't broken the guns in yet. Even then, are you really gonna sit here and talk about mag issues on a Kahr website? I had to put both my CM9 mags in a vice to get them to drop free and sand down the mag followers just to get them to feed reliably.......
My Shield was $398 after shipping and FFL fees. Thats cheaper than the CM9 is typically had with 1 magazine.
Also, as an M&P owner that has an Apex trigger on his full-size. I can say that S&W has greatly improved the trigger--specifically the reset and grittiness. Stock for stock, my full-size's trigger was total crap compared to the Shield before I added Apex parts. The Shield is nice enough that I don't plan on changing anything and imo, its much easier to shoot than my CM9--which is why I already sold it. Why are you assuming the Apex kits are a must and that everyone is adding them? Even then, adding a hard sear is only $40. So for ~$440 you get a gun with an even nicer trigger and 2 mags.