I'm new to this board, so I'm sorry if this topic has been handled before. I'm interested in adding a XD to my collection. I am not that interested in concealed carry on my person around town very often, but I would like an alternative to my heavy 4" Ruger revolver for backpacking trips, canoeing trips, car trips, etc. and would like a gun that's fun to shoot as well. What practical advantages/disadvantages between the compact and subcompact can y'all give me that might help me in my decision? I've read several articles, handled them at gun shows, etc., but haven't shot either one. Also, is there enough of an advantage to the .40S&W to justify the extra cost of ammo? Thanks!