My Sol is quiet as a tomb...that is when the engine is off. As for highway speeds, (around 95 for me) all I hear is my music. Blast some nice Rammstein and you won't heard your engine, or wind, or flexing, or anything else at all.
Motohip - I'm glad you were amused by my aparently signature-worthy quote...I was hoping someone would catch the underlying meaning in there lol.