I could see some good fights breaking out, here...
Round 1:
Alfa 8C vs Aston DB9: Both about as fast, both gorgeous, In the end all coming down to Italian passion or British beauty.
S2K Vs RS Clio: Wow...this could be a tooth-and-nail match between two light, fast, incredible-handling cars with entirely different philosophies. Who will prevail, FF or FR?
Possible Round 3:
GT-R vs R8: I can see this one descending into the bowels of argument. Then again, I predict all the threads involving the GT-R doing that, but with two heavy, four-wheel-drive, technologically advanced vehicles going at it, no-one ever knows. and who knows, it might be that the fanboy protection brigade votes the Exige through, instead.
'Vette Vs DB9/8C: This could be difficult to call as well. Granted, the GT-R has become everyone's new favorite debate topic, but I doubt Euro pride will falter...especially if the Brit gets through.
Final Prediction: Either 'Vette or DB9 Vs R8. With so many people hating the GT-R's supposed fanbase, (and I must say, I don't know what sites you're going to that makes you jump down anyone's throats who says they like it,) I can't see it winning