As everybody else has said, shoot it, you might not feel the need to replace anything.
The guns are good as is, just not spectacular.
If you feel like spending some more money than you already have then replace the extractor and it's spring and plunger with USGI.
I'm 99.9% sure the Springfield spring and plunger are already USGI but why take chances, the part is inexpensive to buy.
If you still feel compelled to switch parts out I would recommend starting with the trigger group first.
Have a gunsmith who knows something about M14s slick up the USGI version.
Take care of this trigger group, lube it and clean it and it should outlast you twice over.
Next replace the bolt with a USGI, Winchester, H&R, Springfield,(The Armory, not the Inc.), or TRW if you really want to spend premium money, It's all good.
Don't use a chrome plated firing pin, stick with plain old steel.
The chrome pins cause more problems than they solve in Springfield Inc. rifles and this is when dimensional differences between the Clone and the real thing show up.
Next and last, replace the operating rod with USGI.
Mind you I have yet to see one of the Springfield Inc. rods that has failed, if you will feel better, replace it.HTH and enjoy your rifle.