An adjustable swaybar is what you need, sometimes you will need it to be loose, sometimes stiff depending on the track. The rear swaybar is a tunning aid. I would most probably go with the 3/4 solid swaybar from MM.
A few buddies of mine have the Steeda unit, but when they installed it they went too stiff and had too much oversteer at the local track (very twistie). I kept them behind without a swaybar in my GT.
I think adjustability is the key, good adjustable shocks and struts and adjsutable swaybar.
One of the best tunning aids is a camera, have a buddy take some shots of you on the corners, sometimes you feel more body roll than there really is.
Rob Hernandez, AFM co-Founder.