I have been running Honda Generators for over 50 years. I still have one I bought in the mid 70's and it runs fine. I would choose the Honda 2200 or two Honda 2200's. Make a 3/4" plywood baffle box, and line it with "Sound Down" (Mylar, acoustic foam, lead impregnated sheet, acoustic foam and glued to the plywood). You may need to have a muffler for the exhaust--a few baffles, with fiberglass fiber on the sides open to the exhaust. Make embankments around the generator if possible.
The Honda's cost more--but they last. They are reliable. Always drain the gas from the carburetor, unless you are going to use the generator within a week. Even though the new ones shut off the gas, and allow the engine to run out of fuel, there is some gas left in the carburetor bowl. That will settle and cause issues in time.
The Honda's cost more--but they last. They are reliable. Always drain the gas from the carburetor, unless you are going to use the generator within a week. Even though the new ones shut off the gas, and allow the engine to run out of fuel, there is some gas left in the carburetor bowl. That will settle and cause issues in time.