Lotus Elise/Exige

Already among the lightest, quickest, and most efficient sports cars available, the Elise roadster and Exige coupe get even faster for 2008: The Elise gets a 220-hp supercharged four-cylinder engine and the Exige gets a 240-hp version. The top Exige is able to reach 60 mph in just four seconds, which amounts to exotic-car abilities at a budget price — and with excellent fuel economy. Airbags are now standard across the line, along with other minor upgrades.