I have an excellent condition 1999 BMW M Roadster that is supercharged. It has the VF350 kit from VF engineering putting out 6 psi of boost for a reliable setup that is great for everyday use. The car is silver with a black interior. It also comes with a hardtop for the vehicle which is very very hard to find. Some other stuff that was added:
Strongstrut front tower strut bar
Kenwood CD player with Bluetooth
Integral Audio 80s Subwoofer (8inch)
Alpine PDX 5 channel amplifier
Bi-Xenon Headlights
Legal Tint all around
Overall, I have kept the car stock besides adding the supercharger for more power. I have not dyno'd the car so I will not have a sheet to show how much power is putting down. I don't race the car and as it is I don't drive the car often. It has 51k miles on it. No rips in the leather and has a dash cover on, however, the dash cover can be easily removed since it was not taped to the dash in anyway. Also, the car has a Noah custom fitted car cover that protects the vehicle from the elements.
Please contact me if you have any questions.