So which is best? Audi RS4,BMW M3,Mercedes C63 AMG

This is a question that everyone asks and everyone wants to know and their is lots of controversy over which is best. I tried to find some cool videos for each company to give you a visual of what the cars look like and how they sound. So which is the best?

Audi RS4

[youtube=http://www.youtube.com/watch?v=cpb1gabRBl8] 

BMW M3

[youtube=http://www.youtube.com/watch?v=-yjynxaLDJ0] 

Benz C63 AMG 

[youtube=http://www.youtube.com/watch?v=dXIOi1ejm6w] 

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