I shot a Kahr CW9 (not CM) and honestly I wasn't blown away. The magazine seemed to be pretty chintzy in quality and the build quality of the gun was not especially great. That said, it did fire without error.
Maybe I just got a well-worn range model, but I'd be interested in comparing the C line to the P line.
The G26/27 I have plenty of time with, and it's a very high quality pistol, just a bit bulky.
As for the PF9, I'm not especially comfortable with Kel-Tec. Maybe the Ruger LC9, but even it has had troubling extractor issues.
Of what you listed I like the G26 best.
Beretta PX4 Type F Fullsize .40 S&W | Beretta 92FS 9x19 Para | Beretta 8040 Cougar Type G .40 S&W | Rock Island Armory GI 1911 .45 ACP | Sig Sauer SP2022 Stainless 9x19 Para | Sig Sauer P6 9x19 Para | Colt Python 4" .357 Magnum | Colt 1968 Det. Spec. .38 Spc. | Ruger LCP .380 ACP | Daniel Defense M4V1 5.56x45 | Alpine M1 Carbine .30 | Steyr M1895 8x56 | Ruger 10/22 .22LR |1943 Izhevsk Mosin-Nagant M91/30 7.62x54R | Remington 870 12GA