you got the taillights, but i'd say Kouki [97-98] side skirts would flow sweetly. you've seen greg's (jdmdriven) car, and it flows way better on the smooth lines of the 95-96.

i cant say much for performance, you have alot of basic stuff already installed, and other stuff doenst always seem like much of a value for what it does (like pullies). you could get a line lock thats real fun at burnout contests and useful for intimidating people at the track