My new fifth wheel is arriving later this week, and I'm researching generators. The inverter generators put out cleaner electricity for electronics, etc., and they're quieter because the engine goes up and down in rpms--according to the load on the generator. They're also more efficient on gasoline, etc.
The gold standard is two Honda EU2000's or one EU3000, and both about the same cost @ $2K. They're very quiet, too.
But the Yamaha generators come in the same size and configurations as Honda--and quality is maybe one notch better. Yamaha also has a 2800 watt inverter generator that'll put out 3500 watts for 10 seconds for your a/c to start up and 3000 watts for 10 minutes. It's the real hoss in the recreational world @ $2222 online.
For economy generators, it's hard to beat the Champion brand. They may be Chinese, but they appear to be a very customer driven company. Customer ratings are very high for Champion. You can get a 3100 watt generator for $315 online (Amazon.) They have a model 3100 inverter RV generator for $987 that's compact and quiet--more like the Honda EU3000 and the Yamaha's--at less than 1/2 the price. It looks like a real honey.