What's wrong with the good old Turbo guys?

You don't have to have a large laggy turbo to make power. You can get them custom made to suit your needs so.. ie: come onto boost earlier, later, mid range. Some guys actually put smaller turbos on the 4.2 to have the boost come on lower in the rev range, purely for bush driving and comps.

I mean, supercharging is cool and all that but I think you could definitely get similar results from looking into custom Turbo's a bit more. Would save a bit of hassle, just my 2cents.