what brakes should I go with?

[64mali]

So here's my dilemma. I want to upgrade my brakes and eventually have a hydraboost system with front and rear disk. Problem is $$$$ so I'm going to go in stages. The car (64 chevelle ) has gm disk brakes in the front and 12 bolt drums in the rear. I want to start with upgrading the front disk brakes. At the very least I was thinking new rotors with the D52 Wilwood calipers but of course I want to go at least 13" rotors. I guess my bottom line is are the D52 much of an upgrade? Has anyone used the 13" CPP disc brakes or the aftermarket C5 kits on Ebay? I want a good stopping and handling car. I might do some local auto cross events but I don't have the budget to build a full on track car, just a nice driver that I can play in from time to time.