New 2004 Corolla S; any suggestions?

I just purchased a 2004 Corolla S. 5-speed manual, Silver, Grey interior. I'm getting the windows tinted next week and I'm currently shopping around for rims (what are my options as far as getting rid of the old rims?). I didn't go with the spoiler (I like the more sleek look). I would like a little more HP but I don't want to void my warranty so I need to beable to do everything through TRD. In time I would like to install a better stereo system and an alarm.
This is my first new car and I'm very pleased with it so far. Ofcourse I would like to give it my own personal touch and make it an even better car. I'm trying to keep the car on a more sleek look and not to fast and furious. Any suggestions would be greatly appreciated.
A.J.

cold air intake, trd supercharger, muffler

check out www.2003corolla.org, lots of people are working on the new model rollas