The Mercedes-Benz SLS AMG GT. Is it really worth the extra scratch over the base SLS? Define worth.

In the GT version, the 6.3-liter AMG V8 hits 583 horsepower (up from 563), the electronically controlled dampers are mapped stiffer and the SPEEDSHIFT DCT 7-speed is quicker in manual mode. Is that worth enough for you?

Perhaps not, or maybe so, if you've got a little over 200,000 bones to toss willy nilly. But if you judge worth by engine note, you may find the ultimate answer in this episode of Chris Harris on Cars, wherein he flogs the thing on the Hockenheim circuit in Germany.