Sometimes the best car to have isn't the one that laps a circuit quickest. Or is it? Does it matter more or less when you're comparing three of the best current, six-figure factory-tuner sports cars known to man? And what's with all the questions?

This week on /CHRIS HARRIS ON CARS, Chris samples the Porsche GT3, Aston Martin V12 Vantage S and Mercedes-Benz C63 AMG Black Series on a damp January at Anglesey circuit in north Wales, and on the glorious Welsh roadways. As surprising as it might seem, no sheep were upended in the process.

Which is best for the track and on the road, and which one would you have? Maybe there are different answers for each of those?