Michilan Primacy 3 ST are supposed to be really quiet too and competes with the Advan dB's (They're a replacement for both the sports orientated HP - (used on the stock luxury wheels) and the comfort based LC)
I have the Michelins HP Primacy and they were ok when you but as the tyres wear out they get louder and louder. Not sure what the difference is between the Primacy models thou.
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