Hey guys I am putting this out there because I could not find an exact answer to this in the forum. I have a G35X 2007 with a rear stillen sway bar, but lately I am thinking of adding a set of coils. Eibach seems to have a resonable set that only lowers the car a little. I really do not want to lower my car to much, but in doing some reading it was said I may need toe cambers which I had never heard of before.
1)which company should I go with that will not lower the car to much?
2)Also do I need any other parts added to the car with this installation?
3)Does this increase performance considerably?

Thanks guys sorry if this is repeating another thread, but I couldn't find any others covering these questions together.