Timhorr,
I would get the 3m protectant. I never got the
oil cooler as an option but wished that I had it now. They look so cool.... There is a picture in my gallery that I just put up that has a pic of the rear of the car infront of the rear tire. It has the 3M film on it. Check it out and you can see that it is hardly noticeable. My car is Titanium colored though and not dark.