Strange that the OP chooses the S65 as the best sounding and, what a coincidence, he also owns a E92 M3...
And your comparison is somewhat inconsistent... E46 and E36 is sound from cabin, E9x and F8x is outside at two different tracks/corners...
Strange that so many E9x M3 owners feel the need to justify that they have a "better" car than the next gen...
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