Hi Mick,
There are a few options around now if you are thinking along the lines of the Jayco Outbacks, as we are also.
I have had a good look at the F400 and it does come out looking good with a large kitchen area, reasonable lounge, good canvas and better finished compared to the Jayco's, the other things I liked were the twin gas bottles in the front boot, compact fluro lights, the large opening kitchen wall panel and the independant suspension, although the clearance isn't as high as the Jayco's.
I have also been interested in the new Golf Bush Challenger, which is almost identical to the 2010 Jayco Swan but with a much better finish and quite a few Jayco options as standard. It also is in the same price range as the F400.
There are also some well priced 2008-2010 Jayco's coming onto the second hand market so it looks like we will have plenty of choices.