Some 4WDrivers in our Landrover Club have been using Kipor gennies for years. They're generally good and they work pretty reliably. They're probably not quite as well regarded as Honda or Yamaha generators, but aren't all that far behind. $400 is a bargain for a sine wave generator in anyone's book - and it isn't a "Bunnings" Chinese special import - the brand has been around for a fair while here in Oz now although it IS made in China. THis must be a new model because I couldn't see it on Kipor's website. I personally have a Honda, but would look at this as a second unit for the caravan.
http://www.kipor.com.au/