follow the link in my signature for first mod info.
out of those choices id get intake and AP. why? because new tune, moar power, pshh sound, sf intake with box is sexy as hell.
with 1000 dollhairs id look for a used catted downpipe and then find a tuner ya like talking on the phone late at night to and sending nudez to and get an etune off them. if ya dont have enough $ for that save a little bit. the car wont run away. orrrr get intake and AP, save for DP and opensource tune then when u have enough buy a downpipe, keep saving until u have enough for tune, install DP, get a tune, resell AP.