Don't try and go so fast in the corners.
I would stick with the the beefy stock front camber bolt and add one of the aftermarkets on each end. Eibachs are cheaper at the moment than the Ingalls and appear to be identical.
http://www.summitracing.com/search/P.../?Ns=Price|Asc
One gotcha is your stock struts. make sure you have clearance for more negative.
On the STIs, about 1 degree less negative in the rear vs. front is about right. I run -2.5:-1.5 as I recall.