This has been discussed before. I believe the consensus was that the Honda is the quietest. I have difficulty with the search tab. If I want to find those discussions on generators...do I just put in generator and do I want threads or posts.
Put "generator" in the space when you click on "search this forum". Keep it on "show threads". Click "go".
Use advanced search for such things as searching for threads started by a particular COTH member or threads you know had a large number/very few responses, or certain dates.