the motoring press I've read says the Audi R8 is a cracker (check out the laptime that Evo achieved with it... wow) - and there is rumor of putting the lambo engine in it, although I'm not sure if they would do that because then they won't be selling many lambo's..
saw a couple at festival of speed and drooled some - if I had about 100k to spend on a (new) car I would get one