Shiv - Thanks for stepping up to the plate. It seems you're more of a turbocharger fan, but I really appreciate that you will defend the attributes of all types of tuning. The sooner we can clear mis-information from the boards, the easier it will be for everyone to make thier own educated decisions for thier own particular needs.
Having said that, and also that my car will eventually sit on the supercharger side of the fence; I don't think there are any good, reliable supercharger kits available in North America...for our Imprezas. If you want a SC, you're going to have to build it yourself. If you want fast, and you need a kit, then the turbo seems to be the only game in town.