Some nice wheels.--would recommend the Axis 7Mod
Short Ram air intake--AEM with K&N Filter
Catback exhaust--Apex'i N1 or HKS hi-power
Nice Body Kit--JDM Type R are nice, u can also look around from other manufacturers like wings west, lips would probably be better than the whole bumper swap.
Performance Headers--DC Sports
Spark plugs--NGK
JDM yellow foglights
JDM black housing headlights
JDM grirll
these are some simple basic things to start of with. i own a 00 civic too and am in the process of getting these or similar ones soon. luck!