I'm going the route of the supercharger, for one reason, just because less people have it compared to turbos. And also, it may not be cheaper but it's easier to get it in and running (to my knowledge; no cutting, welding, etc.) And I'm pretty sure vr4-wannabe is right, SC make all their boost as soon as the throttle valve is open and the vacum valve is closed. No turbo-lag

I just wish someone besides Knight Turbos made SC kits for our cars. Them being the only ones gives them a corner on the market so they can charge anything they want. O well I guess power takes cash.
Just my .02.
-Jeff