I have a G26, 33, 29 and xdsc9. I used to ccw the G26, now I ccw the G33. The G26 is one of my GSSF pistols. The G29 is also a GSSF pistol, however, I wouldn't hesitate to ccw it, and have, if I felt the need like backcountry hiking etc.
As far as the xd goes I bought it primarily for ccw but eventually wound up with the Glock. The Glocks just ccw better for me. Now the xd is just a range, truck or beater pistol. It's an older one before the new finish. I have to say it has been abused, but has never rusted like some of the older ones did. Don't know if I got lucky or it has anything to do with the 2 heavy coats of Blue Wonder Armadillo I put on it when I first got it.
As far as being reliable, both brands have been reliable for me. I just prefer the Glocks more.