"Whatever you chose you'll be looking again in a year because one doesn't really know what works(for them) until they carry on a daily basis"
When I first got my CCW, I carried a Beretta 92FS. Now, I carry an XD-S in .40. When the XD-S first came out, they offered 9mm and .45 ACP. I was waiting for the .40. When it was released, within a week, my father asked my opinion. I told him I was seriously considering it. We went that weekend and each got one (happy birthday/Christmas to me)! After my wife tried it, a third was bought. My father has large hands, my wife has tiny hands, and I have average-sized hands. All three of us find the gun comfortable with the same backstrap (large, IIRC). I preferred the feel of the XD-S in my hands over the Shield (subjective), and have never even held a PPS, but I am very happy with my Springfield.