I am a Sig fan. My fall through spring CCW is a P239. The P938 is just slightly smaller. I prefer single stack for carry, I can shoot them single hand, off hand, single off hand better than double stacks.
People knock capacity at 7+1 but my take is if I have to use my weapon I am shooting and moving. If I have to shoot more than 8 rounds I put myself in a very bad situation (which I don't do ie I don't go to the south side of Chicago). And you can always carry a spare mag.