Honda or Yamaha (2) 2000 Watt generators parallel together

I have used my parallel Yamaha generators to run my 15k AC at home (close to 6000'). They can do it, but I don't think they would handle much more.

I really like my Yami's, but I think if I were doing it again I would go with Honda. It is my understanding that they have a fuel pump and are easier to use an extended run tank with.

The advantage of the Yami's is the fuel shut off. Easy to run the carbs out of fuel and not worry about them gumming up.