Just a tip on the trigger - buy an all steel one. Dlask is supposed to have some done up in a few weeks. I bought a very nice $18 one from brownells (Greider??) that come slightly oversized, which makes for a great fit once you trim it down.
I bought one of those plastic STI ones last year and it's a flimsy, spindly bit of junk IMO.
Oddly enough I have big hands and long fingers but I've gravitated to the short trigger and arched MSH. I take the trigger in my first knuckle and just squeeze. It's how I have to shoot revolver as well.
Oh, and a clarification to the guide rod statement above - they solve a problem that was never there to begin with
I'd go with a new recoil spring, for piece of mind, but no one here has ever to my knowledge had a Norc batter itself to death for want of a Wolff spring