I own both the Shield in .40 cal and the XD40sc (as you can see from my UserID). They're both great guns. I prefer the Shield for everyday carry but I occasionally carry the XD, too.
Incidentally, I carry the Shield in a Crossbreed Minituck and the XD in a CB Super Tuck. Both are great holsters for concealed carry.
If you would enslave a people, first you must disarm them.
~ Adolf Hitler
~ Mein Kampf