I really love Eibach suspension setups. from tirerack.com
as for exhaust you should really look into at least a catback exhaust. Try to stay away from fart cannons. I have a magnaflow setup on my saleen and it sounds pretty sick for a 4 cylinder.
Definitly look into an air intake cold air or short ram. You can purchase them from amazon. I found my k&n the cheapest there. I get 20 percent off at advance auto parts and amazon still had it cheaper >_<
The first thing i did when i got mine was tint, replaced the wheel covers and removed the lunchbox thing in the back of the exhaust (sounded way better). The wheel covers and lunchbox delete were cheap $50. then the tint set me back about $120. i ran it like that for a few months till i got caught back up after taxes and stuff.
I found some 03 ZX3 wheels off craigs list and that took me a few weeks to clean em up, fix all the curb rash and paint em. Mine also needed tires so i had to find some decent tires to put on the 03 wheels.
Found one of those cheap ST wings off e-bay $75. painted it myself.
This to this was only about $200. $500. used wheels, tires and a wing then i think i put about $2k into it after that