Honestly you don't need Z brakes.
PADS and ROTORS thats the name of the game boys.
Size don't matter if your throwing on duraLast, Get some NICE slotted rotors(ebc imo) and some solid pads(hawk, EBC,)edit: throw on some stainless braided lines also.
like everyone said....diff, coilovers, brakes, and Imo get a decent seat, the less you fight to stay planted, the more you can focus on driving. Have fun, and due ya thang. Bro


-Butter knife