Sorry guys, haven't been loggin on so much these days..
anyway, DAMN 450-500 WHP! that's a bejezus amount of power.. At that point, the car probably wouldn't be an every day driver anymore. Big turbo = $$$ in gas.
Like Dean and scott said, learning to drive the car well is VERY important.. as i know from experience

.. however, if you want to have an STi that is puts huge numbers on the dyno and has great straight away speed.. There aint no one here that's gonna tell you how to spend your 15,000 dollars..