the question you need to answer first is whether you want to go N/A or F/I. Theres quite a plethora of options to mod either way. I'm more of a N/A guy so my suggestion would be CAI/Header/Exhaust and then get FlashPro. As far as F/I, I'm not too keen on that, if your really interested in going F/I go to the Forced Induction and Nitrous section and read up on reviews and experiences. Good luck!
EDIT: I just realized this was in the forced induction and nitrous section so I'm guessing you already made that decision. I probably should have checked that before I commented haha.