[gchappel]

Rebuilding your calipers, unless things are really shot, will be cheap and easy. Figure out why you want to upgrade. If you are outdriving your brakes on the track that is one thing, if this is a street car, it is a whole different issue. Once your brake system is rebuilt you will be surprised at how good the stock system is. By the way, there are no good, cheap brake upgrades. Rebuilding your present system is probably the cheapest.
If you want to read about a million pages about brake upgrades for your car, do a search of this board and use the archives.
Gary