first... you're never going to get much speed out of a GXE. those autos are just too durn slow.
You need to either swap your auto with a 5 spd, or sell the car and buy an SE 5 spd if you want something fast. no ifs, ands, or buts about it... An auto GXE runs a low-17 sec 1/4. a 5 spd SE runs a low-15 sec. mine with 205k miles and only intake, flywheel, and udp runs consistent 14.7s with a slipping clutch.
You can pull the stereo from your current car and move it over. you're talking 1-2 days work for that. $1500 in stereo can't be too hard to move. Hell, even the alarm is easy. just write down the wire colors as you pull them out of your old car and transfer it to the new one. took me 2 hours to install it in my SE after swapping from my GXE.
Now... what do you want to do with the car? you want it faster, I know.. does that mean you want to go, stop, or turn faster?
you've got a lot of options in all cases. go faster? get a 5 spd.
stop faster? brakes. (duh) there's lots out there.
turn faster? springs, struts, sway bars, wheels, tires, any of the stuff on my website.
www.mattblehm.com
Nowhere in there does it mention a body kit. They're a waste of money, unless you wanna look good- and even then it's going to cost you at minimum of $1000 to buy a kit, paint it to look decent, and fit it on the car properly. Would you rather put that $1000 in making the car handle better so YOU can enjoy it while driving, or spend the $1000 on a body kit that you're afraid to drive the car hard for fear that you're going to hit something and mess up that pretty paint job.
Hmmmmmmmmmm.