Mods

I just purchased a 2004 Grand Prix GT, it is my first car as I have only driven trucks before, my last truck was a 2001 GMC Sierra lowered with 20 inch rims and several other mods, but due to rising fuel prices and school I was forced to sell her. As far as this car goes (first of all I am glad that I got it and I love it) I am already looking at purchasing rims for it, I was thinkin 18s but I'm starting to lean more towards 20s, and also would like to start putting performance mods on the car, if anyone has any suggestions for anything it would be great.

I just purchased a GP GT2 2004, put a K&N FIPK
http://www.knfilters.com/search/product.aspx?Prod=57-3049
on and there is noticable gains.
Also with the help of guys on here I just purchased a PCM from ZZPerformance. Both are supposed to give 10 - 15 HP each. We'll see though....

Nice, that's great thanks