Let up on the guy. He isn't going to be using the generator next to YOU.
As a "solar snob" I find all of the generator discussions funny. My generator is slightly quieter than yours so I am so much better than you are. Guess what, they are ALL annoying. In a dry campground where half the spots fire up a generator breakfast, lunch and dinner, you wouldn't know if someone fired up a inverter or a open frame. It just becomes part of the din and inside the rig ( where all generators drive you) a EU3000is makes the same hum as a Champion 3500/4000.
So get the generator that best fits your needs, situation and budget. The people harping on the open frames are worried about their needs not yours. They can not conceive of the situations where their choice may not be the best solution.