I was reading Top Gear and they were testing some supercars, Zonda, 575, Murci, 996TT, SL55, and I think the Vanquish. On the track the SL55 beat the 575 and came close to the Murci, while the Zonda beat everything easily. They also said the brakes held up nicely. Not the most elegant way around a track, but I guess brute force does win sometimes.