DRILLED rotors are good on race tracks and in dirt....it is useless in usual city ride, but for aggressive.If i had chance to buy such Cheap rotors i would do one.In Russia it costs about 300$ per 1 rotor......
here it is =( So high price
http://www.supertuning.ru/1511/zgid_.../item_id_8822/
P.S. It is so useful on German autobans for airing your brakes...