I am looking at getting a new car and I have narrowed it down to the SLk 230 and the SLK 320. Is the 320 worth the extra cash? Im looking at the 2000-2002 models. I have a pontiac firebird v6 and it has 200 horsepower, If I go witht the slk 230 I will be decreasing my horsepower. Thats the main reason why I was looking at the 320.