I have carried my Kahr MK40 just about every second of every day since I posted, back in March. I carry IWB at about the "four O'clock" position. I have several holsters from High Noon Holsters (my custom isn't ready yet).
As I mentioned, I looked at many choices, including the Glock and Sig. I ultimately made my decision because of the size of the Kahr being so small and concealable. Just make sure you handle one and get a pretty good feel for the weight, as my gun is all metal and has some weight to it. Any of the choices you list are good and you will be happy with any of them... have fun choosin'!
