I also have the XDs (mod 1) and the Kahr CM45. The grip texture on the XDs mod 1 is very harsh. I think this was the big fix for the XDs mod 2. A grip sleeve helps some. I prefer the CM45 but I am a fan of the grip safety on the XDs. I have never held or shot the S&W Shield in 45.
The XD mod 2 (no "s") subcompact 3.3" in .45 acp (double stack) is one of my favorite guns. The wider grip REALLY tames the 45 acp nicely and it really has an excellent trigger! BUT I do understand that some circumstances demand a narrower pistol.
I practice with the XDs and CM45 and both are good shooters. The XD mod 2, especially with the extended magazine, is a real nice shooter and makes a nice range gun as well as a nice carry gun. The single stacks are more "just" carry guns for me and don't have the same fun factor.