you could do a hellion single turbo kit and make much more power/tq than a supercharger for the same amount of PSI. The kits do cost more~ but not a ton more. A turbo you can install on your own with some time and help from a friend. The TUNE IS THE MOST IMPORTANT PART AND MUST BE DONE BY A GOOD COMPANY. Re read that last sentence 3 more times please.
You can have a company do a remote dyno from anywhere in the world, you just need a dyno and a computer they can dial into and adjust your tune for you