Autox suspension setup?
 

I just bought the first of many suspension mods for next autox season. Grabbed a full set of new KYB AGX's off ebay for 300 shiped. Before every one says koni's are better, I know but for this price I couldn't pass them up. I still plan to run these with my svt springs. But have ran into a very cheap set of new Ford Racing KW springs. Spring rates come close to H&R race springs. Front is 333lb compared to H&R race at 325lb. But the rear show progesive. Would this be a good choice for autox matched to the AGX's I just bought? How rough are they on the street? Any opinions wanted.