To start with, I would change the motor to a better breathing four valve V-6, twin cam, supercharged/intercooled with the boost as high as you can. Next, ditch the FWD for an all wheel drive set up. Put on a ram air CAI, headers, high flow cat and performance exhaust right from the factory. Include stuff like the BMR strut tower brace, lateral and trailing arms, and beefier sway bars. Put in a full instrument array. Use 17 or 18 inch wheels. Huge brakes from the Vette. Granny grabber handles for everyone(not just the rear passengers). Rear HVAC vents and controls. A fold down rear seat that goes through to the trunk. A better trip computer with more data. Better headlights and fogs. Put in an MP3 player. And fix the phone to allow the owner to hook up his own cell phone service. What else?