I to am looking to buy one. Pottering up the Hamble river I'm satisfied that the Rutland 913s are indeed very quiet. I simply wouldn't want a more powerful generator if the noise spoilt my enjoyment of being in the cockpit. But a neighbouring boat has an Aero6gen (most powerful of the Aerogens - Google it with the 6 in) which is more powerful but frankly creates very little wind noise too. Anyone have experience of the Aerogen?