I own a Glock 22 & 27 and a XD9. I love all three guns and carry all three. The XD's are a great gun, so far I have about 900 rounds through my XD with no problems. They take apart very easy and I do like the trigger better but dislike the trigger reset. I'm learning to live with it
My Glock 27 is also 100% and carries very well. To me the XD .40 SC feels a tad wider but if it feels better to you go for it.
For a wealth of info on the XD, come on over to
http://www.xdtalk.com Good guys and some good info on the XD.