I'm a huge Springfield 1911 fan, and have more of these bad boys than my wife knows about...
If you haven't, read through Todd's blog post;
http://pistol-training.com/archives/6936 It's a good documentation of his 1911 journey, and if you read it from start to finish it might save you a bit of time.
I've run my 1911's pretty hard, teaching and taking multiple high round count classes back to back during the season at The Site. I follow Tim Herron's social media sites, he puts out a lot of great information and inspiration, plus he seems to be an all around good guy.
I install VCD grips on my 1911's per Tom Givens recommendation, and I love those. In a perfect world I could get VCD grips for my 92's as well.
I replaced the sights only because my eyes don't work with regular night sights. I replaced the recoil spring with a 14# spring because it was time to replace the recoil spring. I run CMC 8 and 10 round powermags, if you purchase CMC mags give them a call. Some of their mags won't work in the TRP Operator while they will work in the Operator. The Wilson 47D mags function flawlessly but I've only got 6 of those as opposed to several mag cans full of CMC mags. I believe Tim Herron runs 47D's 8 round mags without issue but I could be wrong regarding what he is currently using. At the time I spoke with him he was running 47D.
Other than that, I haven't done anything to my SA's except clean and lube. I think the SA 1911's are the only pistol SA does right.
TL/DR; The 1911 rule of thumb for a 1911 that runs flawlessly as possible seems to be; clean & lubed pistol, quality mags, and leave it alone.