I'm finally coming to a point to be able to get another pistol. I like Glocks and have a 23 and 21. I really enjoy shooting both of them but the full size .45 seems to be more comfortable. I have checked around and like both the Springfield XD and S&W MP. I'm looking for some input to make my final decision between these two and deciding between which caliber. I have always liked .40 caliber but since owning a .45 I'm torn to say the least. Any thoughts or suggestions would be greatly appreciated.