How different is the performance between: 1) H&R springs Vs 2) Neuspeed springs Vs 3) HOR Technology springs? All of these mated with either Bilstien or Koni shocks. I want to noticeably improve handling while minimaly lowering the car or altering the ride quality to the harsh degree. I will be keeping the stock rims though. Thanks for all of the input!!!!!!!! Talat 97 GLX Blk/Blk