In the first of a new series of Top Gear Jeremy Clarkson, Richard Hammond and James May head for the Isle of Man to decide which is best: the new baby Aston Martin - the V8 Vantage, BMW M6 or Porsche 911 Carrera S. And car cultures clash when the Austin Healey Sprite takes on a Peugeot 307 in a hill climb challenge and a supercar, the Ascari AKZ1, takes to the track.