Dont compare it with Porsche or MB, they are different animals. If you want to feel the engine, the road and handling of a real sport car go with a Porsche or SL500 or if you have the bucks go with a Ferrari but if you want to have a quasi Sporty convertible car with real luxury, the best reliability in the market, good power (60MPH in 5.8sec.), excellent comfort, outstanding stereo sound, premium amenities and you want to keep the best value in a car the SC430 is the car! Some people, disapprove the back seat, but to me it's a good thing, why? Because my insurance is not considering my SC like a Sport Car that normally is 50% more expensive expensive than a regular car because the 4 seats.
Convertible car with real luxury, the best reliability, Good power (60MPH in 5.8sec.), excellent comfort, outstanding stereo sound (best in the market), premium amenities, 4.3-liter V-8 features VVT-i engine that achieves only 19-mpg in the city and 25-mpg on the HW and a very low depreciation.