If you're not tracking the car extensively, there's no reason to upgrade the brakes. The rear drums should work fine, but discs are easier to work on, and have better feel. Stazi's kit is good quality and a great price. Slotted rotors are completely unecessary - they'll just eat your pads in no time, and unless you get very high quality ones, they'll crack much easier. The best brake job I'd reccommend as being worth the money is Stazis kit (including rear discs), speedbleeders for the calipers, and some good fluid. Anything more is bling, really. One note: SVT front rotors are a cheap upgrade that will give you a little more fade resistance,and look a little bigger behind custom wheels, but I have no personal experience with them, so I won't say they're worth it - others here will, however.
