After reading and researching a lot about coil overs. For me I have come to the conclusion that unless I am ready to spend many thousands of dollars not only in parts but tuning as well it's better off not to mess with it (it being the nismo setup). From what I have read the lower cost and even average mainstream shocks for the most part are so poor in consistency it made them wonder if they even came from the same manufacturer.
This guy coveres not only shocks but pretty much everything suspension wise.
Autocross to Win (DGs Autocross Secrets) - Buying Shocks