Swiss370 has probably one of the better Stillen SC setups and has upgraded a lot:
First STILLEN Supercharger 370Z swiss
There have been some who have gone with the Stillen SC with the goal of 500whp and all have sold their kit and moved onto another option. If you want to stay SC then GTM is your only option but if you want to migrate to TT then you have GTM, Fast Intentions, and Greddy.