I agree that the Honda is a great Gene and very quiet however, I have a 4 stroke pure sinewave chinese import that has done an admirable job to date. Bought of ebay for $600 (new) and it has not missed a beat. I use it for camping in SE QLD (mainly beach at Double Island, Inskip Point and Fraser Island) for up to 3 weeks at a time. It runs lights, fridges, toaster and microwave (yes it still is camping; anyone can do it tough) no problem. Also use it around home during blackouts (last one was 36 hours). Change the oil every 50 hours running time and ensure I wash off all the salt after each trip and spray with a quality product. Easy start, up to 14 hours running time per tank (depenant on load) and still super quiet.
Have had it for three years now and couldnt be happier. Yep the Honda is good but dollar for dollar, I could buy a few of these for the price of an equivalent Honda. Come with a 12 month warranty from some traders such as the one in the link below.
http://cgi.ebay.com.au/Silent-Invert...item2a052ce061