Friend of mine has the 3500 watt. It has been great. They were able 2 run to campers with ac on without tripping the overload. I borrowed it a couple times for my trailer. It is quit and has decent run time.
They must have been the smallest campers known to man!
My vote goes for briggs and straton, they had this model called Storm Responder 6250 watts, it was like 800 bucks at lowes, I think HD has the 6500w one for 900. We ran that generator nonstop for 35 days 24/7, I never changed the oil, and it was ran in 105+ degree heat during this time. If you remember Hurricane Laura, it smashed our house with 2 trees, and knocked out power in our area for 30+ days. Only problem was that on day like 20 of it running 24/7, in the sun with no shade, it turned off because it was really hot. I put some shade deal over it, never had another problem.