Are you set on a 9? A 1911 in .45 ACP is pretty slim. For a 9, Kahr makes some really compact stuff.
I didn't like the lack of safety on the Kahr. It doesn't have the opposing pressure releases like the XDs do, only one on the trigger and I couldn't get past that. My new LC9CL is really nice and for how small it is, surprisingly controllable.