My New 02' Si Civic

i have really taken a liking to my new 02 si civic, after having a 99 dx hatchback civic for a couple of yrs, it feels like i have gone from a seat on the city bus to the pilot of a fighter jet. The car just wraps around you in moves when and how you want . The shifter is the greatest, i mean it makes you want to haul ass even just to go to the corner store . So far i have tinted the windows , of course threw a alarm on there ( so i wont steal it from myself )and changed all the the bubs with some hyper whites with the exception of the tail lights. What are some other ideas for performance do you think i can go with for the the average street racer-( not professional) i dont want to build a race car just something on the street that can handle its on...intake , exhaust, maybe some wheels other than the stock 15 etcc... holla back peace!