It'd be nice to know what the packages cost. It seems like with many factory packages, they cost a lot for what they deliver. An Edmunds test gave a price of 11K for a basic supercharger package, or 24K as tested with all the suspension and wheels and tires and such.
http://www.edmunds.com/insideline/do...leId=140366#14
They do not seem to have much of a unique look, which I might have expected from a factory upgrade package. Nothing wrong with a sleeper though.
I'd probably just buy my own blower and take it from there.