Cheapest and most reliable way to make 350whp?

Hi, I'm new to the board. I'm looking into a new car and I see the stangs are beasts on the road. I want to know its capability before I bite the bullet so I was hoping if you guys can answer a few of my questions.

Whats the cheapest and most reliable way to make 350whp/350w torque out of a 2004 mustang gt? I want the torque and hp but don't want the car breaking down every other week. So what mods and how much?
 
This supercharger makes the stang more tempting. What's the novi 2000? What else do I have to change with adding the supercharger? What products would help mustangs in the corners, or overall handaling?