If I had seen this poll about 6 hours ago. I might've voted for the Audi TT because I like it alot.
However, I have just figured out how to make the Motorsport Elise a track monster.
Mine has the turbo and full tuning with 364hp. It was always an OK car but now it totally matches my driving style and pulls in tighter and tighter on the longest fastest sweeps in the game.
It is smashing alot of my records for certain tracks which makes sense because it has 364hp and weighs under 1,700lbs. A little tuning was all it needed.
I do like the characteristics of the TT's engine. Low torque which is good for keeping traction, too bad its AWD anyways!