To the Lamborghini faithful, the nameValentino Balboni holds a lot of meaning. Valentino was Lamborghini's official test driver and product refinement guru going as far back as 1973, and he's recently retired.  To celebrate Balboni's work at the raging bull, they've come out with a new model commemorating him in the best way possible - a Lamborghini, exactly as he would've wanted it. Based on the smaller Gallardo, the LP550-2 Valentino Balboni is the only Lamborghini in the lineup that's purely rear-wheel-drive.  The Gallardo, which was designed to be AWD, had to be redesigned in some ways to adapt to rear wheel drive, but Lamborghini promises the LP550-2 delivers a more active, controllable driving experience. The Audi-derived 5.2L V10 produces a healthy 550 brake horsepower.  Since the