:wavey:
Koni Yellows are the stuff. Coilover wise he should probably look at Ground Control. Lots of SCCA championships have been won with that combo, and it isn't very expensive either.
Mod wise... he should really decide if he is going to go forced induction or not, because if he ends up picking up a 60mm catback exhaust, that's not going to flow enough for a turbo.