...if I bought the usper charger...
Buy an usper charger? I've never charged my usper and never felt a need to either.
Seriously, it's been discussed on XOC a number of times, if you search you should find some good discussion. If I recall correctly it's not a simple bolt-and-go kind of thing. Besides, supercharged Xs require premium fuel and at least when I test drove one, it wasn't a night and day, "I've got to have all that power!" kind of difference.