A carry gun should not be confused with range/target gun. The GI Mil Spec is already set up for personal defense, low profile / no snag sights, significant trigger pull. Personal defense is point & shoot.
Spend your upgrade money on a second 1911 with adjustable sights for the range.
With the above said, if I send you a $1.50 it should get you a cup of coffee.
The GI performs really well as is, but i have to admit that i cant leave well enough alone. I wanted some stainless parts on mine to give it a slight two tone appearance, so i switched some stuff out. Mine came with hump and bump sights but ive always trained with night sights so i switched the sights out with Trijicon night sights.
Semper paratus.....virtute et armis
If it performs as you need it to I'd leave it alone but if there are things that you would want you to do to make it more comfortable for you to shoot it and shoot it well, I would highly recommend that as well.