I also recommend lurking around this specific section of the forum, as you will manage to grasp a bit of info about each type of forced induction; in addition you will find issues, and debates about how and why things are done.
I would recommend discarding the idea of a supercharger as its not what this car wants/needs ( IMHO)
Many nice Turbo options exist and my recommendations is look into @
FullBlown, @
ptuning and @
MAPerformance. Pick up the phone and call all these guys and talk to them as they are a very nice bunch whom take all customers with open hands and guide them through out the process, and not let them hang after money has been paid.