jordan knows what he is talking about. note, those who say that you need a frontmount say "you need a fmic, supra sidemount sux." those who say you should get a supra sidemount back it up with numbers and real life experience.

personally, i would do it in this order:
walbro, kyb agx in the rear, nittos (245s) on the front, dsmlink, 550s, supra sidemount, evo III 16g

with some good driving and tuning, this is the cheapest route to high 12s, low 13s