well, lets assume price is not that much of a factor here. Starting with cosmetics I would do the following: First I would tint the windows, a white car with dark tinted windows looks very nice. Next I would move to the suspension. I would go with a GroundControl coilovers, and KYB/AGX shocks. I would get bigger front and rear sway bars, along with a strut bar. As for the lighting goes, I would either get the Jspec front end. If that is out of th question, I wold at least get clear bumper lights, thats it. Next I would look into getting a very mild body kit, such as a front lip, and side skirts, with a rear lip also. I would keep the trunk as is, without any spoiler. Next for the interior, I would either try to get the Black leather GSR? seats, or get Racaros for the front. Myself, I love the way white gauges look, so I would go with those. For the sound, I would go with
THIS Head unit, and the speakers would be done accordingly. Now for more performance wise now. I would not do a GSR swap myself, but rather get some internal work done. I would get the motor strengthened for a Jackson Racing Supercharger. I would not get it boosting to high, but enough to give it te punch needed. For the exhaust, I would go with a Sheep Dog catback exhaust, with good quality header. throw on a short shifter, and you should be all set. That is pretty much the basics on what I would do.