Brake kits: 4 piston or One ??

wilwood stuff is a safe bet but can be a little pricey but if you have the money you can't do much better. for good bang for your buck you can always look into Dr. Diff, good stuff good prices, especially if you don't plan on racing your stuff really hard

I don't plan to run the car very hard at all.

the standard 11 inch factory rotors should be plenty.