I personally would stay away from forced induction, nitrous, and superchargers/turbochargers. The engine wasn't designed to handle that type of power. I'd say get an SS if you want those since it's more of a racing engine. Plus they cost quite a lot to buy and to have it tuned and such. Not to mention if this is you everyday car, the last thing you want to happen is to blow it up.
Stick to exhausts, intakes, headers, suspension, brakes, and tires. You'll be able to get a whole lot of additional power sufficient enough for you to have fun with.