If you want to have a play around with it, I recon there is probably more that you can do with a G60... although you do have the uncertanty that is a 2nd hand charger.
My mate used to complain that his 0-60 wasnt great in his g60 'cos he hit the rev limit in 1st before he blinked. Think it was sitting at 200break and 220 ft/lb torque.
Personally I would go for a VR6 though ;o)
- Ross