For what it is worth, I put KW coilovers and koni's on for road racing. My car is low and will be left at the current height. I get some tire rubbing with turning the wheel real sharp. I took the car to Mid Ohio and really enjoyed what it could do out there. I didn't have much lean and was amazed at how the car handled the corners really well. My KWs and konis were obtained from Needswing. You can read about some of my experiences on my thread: Racing Modifications in Progress.
Good luck and you'll be glad you lowered your car for racing.

Jane