Turbo Or Supercharger?

[BFD83]

hey guys, just curious as to how much the price difference is between gettin your stock 4.0 litre turbo'd or supercharged? 1 of my mates said that a supercharger would cost around 10 grand and a turbo around 5? my car seems to be a bit sluggish sometimes i.e doesn't take off fast enough sometimes i gotta rev her out, any tips on improving the performance as i aint got much money atm lol. i currently got a 2.5 inch exhaust system, pacemaker extractors & k&n air filter.