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; 92FS; 92S; 8040G | Sig Sauer SP2022; P6 | Colt Python 4"; 1968 Detective Special 2"| Smith & Wesson M642 No-Lock | Ruger LCP; 10/22 | Daniel Defense M4V1 | Remington 870 | Alpine M1 Carbine | Steyr M1895 |1943 Izhevsk Mosin M91/30 | Walther PPS