Keep in mind, nothing needs to be changed for you to enjoy the pistol, and you might well prefer the original format when all is said and done (for example, I took all of the extended controls off of my sport model, and put on small "Govt" sized controls). BUT you can probably swap all the springs for Wolff standard weight springs, and that would be a very smart bet. You'll probably have a use for extra mags, that's an easy one. And a good holster and mag pouches.
Have you shot a 1911 before? Probably the biggest change in how the pistol feels would be a beavertail grip safety and a flat mainspring housing. Grips matter, too, and Norinco is not famous for producing desirable grips. All the other controls are important, but you won't know if you want a change until you feel the pistol in hand.
As to how the pistol actually shoots, well... It depends on what you think is important. I think the trigger is sometimes pretty decent on the stock Norinco 1911s, so I wouldn't buy those parts until I was sure I didn't like it as it is. In terms of action shooting, I'd stick the EGW oversized flat-bottom firing pin stop in for a major change in recoil impulse. Then I'd want to swap out for a shooter would be the sights, but that's not easy or even possible with the often non-standard dovetail cuts on Norinco slides.