ok, as i have noticed in our "lovely" car, there is a sh^t-ton of body roll. (in fact, the body roll caused me to crash once) the good news is, to make the car handle a whole lot better it is fairly inexspensive.
1. the car needs to be dropped. i have ridden with my stock wheels and my 17's and wheels arent a total must. but the center of gravity sits too high. i am using sprint springs (1.8") and the difference is good.
2. a big help is strut bars. many companies make them and they are fairly inexspensive. they stiffen up our car and take away some of that body roll. there are a few companies; DC Sports, Road Race Motorsports, and i got mine of EBay from XO2 racing.
3. i am quite sure that sway bars will also improve a lot, but i havnt tried them yet.
good luck,
Paul