Did you read the part where I said the P290 has full size sights. Of all the guns you listed, which of the 9mms have full size sights? I really looked at the Kahr before buying the P290. The Kahr is a little smaller and a little lighter. But I did not care for the sights, at least on the ones I looked at. I also read the Kahr was a little snappy when shooting. After the first couple shots with the P290 I got use to the trigger. I did not notice it being anymore snappy then my G26.
I also own a SIG P938. I do not carry this however because I do not like carrying guns with a manual safety. I wished they made a double action P938 w/out a safety. I like the size and weight of the P938 over the P290.
Just my opinions.
And I looked at small 9mms made by S&W, Ruger, Kahr, Keltec, and a few others. I also thought about going to a 380 but I just could not bring myself to carry a 380.