Forced induction is alot more expensive than you might think. When you start getting over 500hp you need forged motors, performance tranny's, stronger rear ends, better clutches, etc. Most of the time to do it right you're looking at 12-15 thousand in upgrades to the car. I see time after time at the track where a well set up normally aspirated cars put down better times than forced induction cars. A good heads and cam car will do very well at the track for alot less money.
Now with that being said. There is nothing quite like making 500-600 horsepower. It is scary fast. It will spin the tires going down the road at 50mph. For pure fun there is nothing like a boosted car. Unlike nitrous it is always there. And no bottles to refill. You can use a smaller cam with forced induction and retain driveability and gas mileage.
Paxton superchargers are not the top shelf supercharger. I would stick with procharger or vortech. There are literally 100's of used superchargers for sale and I would not get the paxton if it were me. I would buy a used kit that has most of the little stuff. The little stuff will add up and end up costing more in the end. Hope this helps.