We ordered our Onan from the factory with our 3075. We also had an Onan in our 05, 2955 before that. They are easy to start, reliable, quiet, and can handle the AC surges. We would not get anything else installed in our 5er. It's one of my wife's favorite options.
That being said, Honda makes a wide range of great generators too.
I'm sure Genarac makes quiet generators but i have not heard one yet.
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