For Jeremy Clarkson’s new DVD he has traveled the Planet – from Spain via Strasbourg to Swindon – for the Supercar Showdown to beat them all. His aim is simple – find the ultimate Supercar. Jeremy starts a fight between the Ferrari 430 and Lamborghini Gallardo. The Gallardo’s big cousin, the Murcielago, weighs in too. The Ferrari 599 GTB Fiorano struts its stuff and Audi’s R8 faces up to the Porsche GT3 as special guest,…