Thats a good start. Next thing i would do is get a tuned PCM made by DHP or Overkill. Both are great. Then get you an intake that makes you car breath.
Heres a few links for making your own. Not hard to do at all, and will save you tons of money.
How to - Cold Air intake
http://tacgp.clubgp.com/custom_mods/...ake/index.html
Tools
Hope that helps. Last 2 are my fav.