I own (kind of) a version of each. When I say "kind of" I have an SP101 without the bobbed hammer, an XDm .45 and an M&P9 (Full size, not the shield). While I love the SP101, the trigger leaves a LOT to be desired. It is also heavy, its a freakin tank but it shoots great if you get used to the trigger. I put a Trijicon front sight on mine and it is my nightstand gun. Well, my 870 is by the bedside but the Ruger is on the nightstand.
The Smith and the Springfield are both solid pistols too, honestly you are putting up a really tough three to choose from. You will not be disappointed in any of them.
The factory Ruger grips leave a lot to be desired as well.