With two seats, a luxurious interior, and a standard retractable hardtop, the SLK is like a scaled-down SL-class for around half the price. The SLK300 is powered by a 241-hp turbocharged 2.0-liter four-cylinder mated to a nine-speed automatic transmission; the SLK350 features a 302-hp 3.5-liter V-6 and a seven-speed automatic. The V-6 is the more fun to drive of the two, but beware the price: the SLK can get pricey with options. Want max performance? See our review of the 415-hp SLK55 AMG.