S2000 itself, when it was new, was an expensive car. these aren't meant for little boys, they are two seater roadsters for executives and businessmen, professionals.
As for the BMW interiors, it depends, I have the chrome finished interior, which is part plastic, part metal. It's pretty sleek. But interior is more than just the dash. The seats, fit and finish of the seats, the color theme etc all come into play. My interior is Red Coral leather, sport seats with lumber support, you can depress it and inflate it at will to fit the contours of your back, etc. The interior is pretty tight.
As for the guy looking for a new ride, if you aren't too hung up on a turbo/supercharger...think about an E92 M3, naturally aspirated V8, 414 HP.