I have to agree with the earlier post about doing some research in an effort to garner a knowledge base for yourself and thereafter making an informed decision.
Superchargers and turbos are an investment that (based on the build and the amount of additional added power) generally require further investments to support the addition of said forced induction.
We'll be happy to answer questions that may arise based on your research, but help us out here a little.
This wiki article will give you something to start with.
Supercharger - Wikipedia, the free encyclopedia
Good luck with your research, congratulations on the purchase of your Z, welcome to the group...and be sure to contribute often.