Thank you for all your help and suggestions.
Good news is - we already have a Sterling 1230 (12v 30amp) charger, so I think that side of things is taken care of.
The call really comes down to which gennie.
My issue really is the cost of the Honda and is it REALLY that much better.
I guess in for a penny in for a pound it would be the Eu20i that we would go for - which is coming in at around £880 from Edge, £890 from Just Gen and £873 from Tidy - this is a 'tidy' sum of money.
Looking on eBay there is this Kipor 2000 generator, which appears to be only slightly louder and have only slightly higher fuel consumption - the price for this piece of kit - around £300 (here is the link)
Can you see my issue?
I know the Honda comes with a 5yr warranty, but I could buy a couple of the Kipors and still be in pocket during that time... the issue is does 2db really make that much of a difference - I can house it in the engine bay, so that will muffle it too... its enough to drive you crazy!