The value to be found in a $340,990 price tag is in the standard features, such as the afore-mentioned heated, massaging seats, 20-inch wheels, a choice of interior wood veneers, satellite navigation, aquaplane detection, two valet keys and two umbrellas. The EPA rated fuel economy is 10 mpg in the city and 14 mpg on the highway. It is not inexpensive, but that kind of money buys a limited-edition, fully evolved, meticulously refined, ultra-powerful supercar--unavailable anywhere else.