I currently carry the springfield XD 40 (4" not sc) but I will tell you I absolutly love it and have not met a person yet that didnt love how it shot. My dad just bought the XD 9mm SC and I felt it shot the same as long as I was use the extended clip. the small clip made the gun sit on my pinky instead of allowing my pinking to wrap it. I carry it in a black hawk serpa OWB. I also carry a S&W 99 (40) IWB in a Kholster it just depends on how I feel that day. I dont have any experience with the PPS but do have the P22 and know walthers are wonderful guns it sounds like you are stuck between a rock and a hard place but would say try and find someone that will let you shoot them if your really not sure which one you want. Hope this helps and not make it harder
"The purpose of war is not to die for your country. The purpose of war is to ensure that the other guy dies for his country." - General Patton