Brake and suspension upgrades?

I'm looking at upgrading my brakes and suspension what are proven quality aftermarket parts. I want disc brakes on all 4 corners, new control arms front and rear upper and lowers, and maybe some chassis bracing as well. Just want a nice street car with the odd trip to the drags or road course. I have a 87' GN. Was looking at CPP stage II suspension kit.
Thanx