I almost went with a supercharger on my Tiburon. About $2800 for a roots type blower, water intercooler... to take it from 155whp to about 230whp.
Decided not to spend any more money on that car... After headers, intake and exhaust, I'm probably making 170 at the wheels, and it's good enough for a daily driver. And I can drive pretty much anything around here year round.