I carried a XDM45 compact for a few years. You can switch between a 9 round mag or a 13 round magazine. I'll put my vote on the XDS 45, I ran 300 rounds through the one I have with no problems.
I was in the same position. Girlfriend did not like guns so for her birthday I got her a Walther P22. She loves it. It's been almost a year and I told her we need to move her up. She did not like my xdm45. So we went down to my Sig P238. She shot it well and liked it.
My EDC stays with me all day until I go to bed at night then it stays on my night stand the rest of the night. I keep a few options throughout the house.
The gf has never been shooting ever. So I went ahead and got her a Walther p22 for her birthday. We went to the range and she put 100 rounds rounds through it and she loves it! She was pretty accurate with it. I figure she'll put a couple hundred more rounds through it and we'll start looking...