Turbo..... You don't need hp to make hp... Turbos have always appealed to me more then superchargers. I did a technical paper in a technical writing class about supercharging vs. turbo charging. Back 15 years ago, supercharging was better...but now you can make WAY more hp with a turbo.....unless your pumping 10,000hp like a Top Fuel dragster...LOL
Are you still looking for a supercharger? I have an 09 Solstice 2.4 auto with a DDM supercharger. I am planning to go the LS3 route so much of my current drive train will be avaiable. If you are interested please email me at [email protected].