The BMW 6-series convertible, the Maserati GranCabrio and the Jaguar XKR Cabriolet are models that offer exclusivity at equally exclusive prices.The Maserati will set you back the most - at least 132,000 euros, but you may never tire of the music its engine makes. The Jaguar is the most powerful. With 375 kilowatts, it does 0 to 100 kmh in just 4.8 seconds and hits a top speed of 250 kmh. The cheapest is the 6-series convertible, BMW's new flagship model. At 4.9 meters in length and 1.90 wide, it's also a big car.