I live in the valley area of LA, and on the 101 freeway, after the usual Sunday Calabasass car show, i saw a Bugati Veyron racing a 1000hp M3 whose owner i have met. Neck and Neck for as long as i could tell, which was like....5 seconds haha.
It took me a long time but i finally gathered pictures of nearly 100 of the best concept cars out there, if anyone wants to take a look, or set them as your wallpaper or something, check it out here, all in one file:
http://www.MegaFTP.com/23302