Go with some really nice 18's (chrome) and get a GOOD coilover and shock package so its not bouncy. With the coilovers its adjustable so no matter what the wheel gap is you can always go lower.

Big rims and bodykits make me laugh, all its doing is making the car slower. Its just nothin but weight. If anything, keep either the stock lips or take them off and have nothing. If you go with the stock body and no lips keep the spoiler on, if you keep the factory lips take the spoiler off. If you get a body kit find a spoiler that matches or dont put one on the car.

As for the exhaust, just but some brand name mufflers and put them on the stock piping. Or buy a cat-back, Greddy has some really beefy lookin mufflers (look great IMO)