Well, FWIW, I have been struggling with the same question for my 5er. I want something that is light enough to carry, quiet and will run the 15K BTU A/C. As I have found, that is a big order.
Bear in mind that NPS apparently has a 60 db A limit on SPL in the parks. Also bear in mind that that SPL doubles with an increase of 6db SPL. This means that a gen which is 10 db louder is a LOT louder than the other one. Also bear in mind that 2gen sets running together will increase the SPL 6 db over 1 running alone.
The Honda sets which have a throttle down feature for a reduced load have big returns over constant speed units.
As far as the China question goes, dealer service network is the big issue here. If it goes out, a big dealer service network trumps just about anything else.
In the end it goes back to the basic law: you might not always get what you pay for, but you always have to pay for what you get.
If anyone has a magic bullet, PLEASE give me a call!