If you want huge brakes, you have to have 18" wheels. Rotora and stoptech sell some beefy 4 piston kits for around $1300 and 14"- 6 piston kits for like $2300. That isn't tooo bad if you are hardcore about racing or you have a super fast car.
I would mainly want the 6 piston brake calipers for looks more than functionality. If my sig indicated anything, most of my car is all looks and hardly any "go" lol. With all the money I spent on my car, I could have purchased a supercharger. But as with any girl, looks matter Why else do we have a gajillion pairs of shoes and clothes?