Look away now if you're a die-hard Mustang fan. I should say straight away that the Monaro VXR is not your average Pontiac GTO but the UK version of the HSV which is way way better than the stock Holden item. Still, you might think modifying a GT is a better route:
http://cars.uk.msn.com/Reviews/article.aspx?cp-documentid=1077431
http://cars.uk.msn.com/Reviews/article.aspx?cp-documentid=1077431