Of all US-legal cars currently in production, I'd probably have to go with the Mosler MT9000 Photon. Made out of carbon fiber and chromemoly, well over 1g on the skid pad, sub 3 sec 0-60. But I'd get a procharger centerfugal supercharger for the Z06 motor just to top things off.

600+whp in a 1,980 lb car? Yes please!