i've had the same problems with the gs since i got it.... the car's so damn heavy so everything i do seems to have no effect (damn those light hondas... lucky *BLEEP*s) oh well we're rollin with style so that makes it all better.
as far as mods i have an intake,exhaust (APEXi World Sport), S-AFCII, and a nitrous system i started out with a 50 shot to see what happens and i recently bumped it up to a 85 shot and it seems to be doing just fine!! if you have any questions reguarding nitrous just ask me. (yeah i was afraid to run nitrous at first but it's not bad stuff like people make it to be... you just have to be careful)
in the next month orso i'm getting a engine and tranny swap done withe the twin turbo moter from the supra and adding some other stuff and putting down about 600whp; and found a guy that could hook me up for about $5000 installed!!! that's a good deal considering it's the engine,tranny,and install so look into that too.
PS. i know how you feel in the school parking lot with beemers and riced out hondas LOL