Ferrari. They made more than 10 times as much revenue as Lambourghini in 2010.
I also saw the 458 and the scuderia today! Went through the centre of London, in the rich area, by the embassies where the rich people live. Just happened to see a 458 driving on the other lane, I wanted to follow it and stare in awe but unfortunately the stupid rails were in between the opposite lanes. But fortunately the scuderia was parked so I delayed my haircut appointment just to have a better look!
I think I saw over 1 million pounds worth of cars today: the 458, scuderia, a bentley continental gt, a rolls royce phantom or ghost, not sure which one it was, a couple of Porsche carrerras, loads of BMWs, Mercs and Audis, an Aston Martin DB9, an Aston Martin Vantage and a couple of range rovers. Thats over 1 million, surely. And no, I didn't make this up. If anyone doesn't believe me, go for a stroll through the centre of London. Ah, and I didn't see any lambourghinis. Does that say anything?
But, my favourite two cars are the 458 and the Aventador (excluding the bugatti veyron Super Sport) so it was hard deciding - until I remembered the enzo, the 599, the FF, the F12, the F70... The list goes on. I went for Ferrari in the end. It was the obvious and better option.