I got 370Z calipers for £150 each - about 200 USD, so 400 for the calipers, brand new 370Z nissan oem rotors for £100 - so another 140 USD - plus the stainless lines and adapter kit from CZP forget how much that was but it wasn't stupid money.. I will be doing that again on my second Z.
Important to note that you'll need to factor in the cost of bigger wheels if you haven't already