if ur really looking into going forced induction..then dont waste ur money on parts that u'll replace...such as a cai, headers...i think that u should really set ur mind on what u want out of the car and which route u want to go..if u want to go turbo eventually then start working on ur fuel management
i wasted my money on an aem cai (great product btw) but i had to pull it out later on and its money i could have saved =)