if you havent even started modding your car yet i would recommend to start with the basics like intake , exhuast, fmic, mbc, fuel pump rewire, maybe even a bigger fuel pump. just with these you should be able to feel a noticeable difference. then you will be ready for a bigger turbo. do your resarch before you buy a turbo though, you dont want to regret it later because it gets pretty expensive to keep replacing turbos if your disappointed.