No compromise what would be the best springs/ camper kit for racing, autocross. I do very little drag. I'm just saying what would be a very good setup for racing on a track, cornering body roll all things considered.

 

there is no "best" it is all a matter of preference.

All you are going to get response wise is peoples OPINIONS which will vary greatly.

spend some time in the auto X Forum and research from there. What is good for one person is not good for another.

 

Don't think you want to install a camper kit on you Z

And I agree with USN HM 350Z, it is all driver preference. What works for me, will not work with you. For suspension, I would first find out what effect any change you make would do (buy a book for this). Than if you still don't feel confident - I would go to a race shop and talk to those guys about what you should do.
Then sit down and write down your goals and you budget and make sure they match. Then change one thing at a time and test.