I know Napa has a good reputation around here for good cheap blank rotors. However, when I went to my local Napa, the front rotor for a 90 miata was $29 each and the rears were $24 each + tax. Online at import replacement parts (http://www.importrp.com/product.php?productid=111576&cat=38&page=1), the Brembo blanks are only $31/32 each free shipping! With these prices, is there any reason to stay with Napa blanks?