In reply to SiWood:
I don't think you would have problems with lenses, as the F80 doesn't fully support metering on AI/AIS (i.e. you won't lose anything). I've never used an F80, so I can't comment on robustness etc.
However, the main thing to consider is that you may not get full warranty service if you import from the states - it IS possible they will honour warranties on self-imports (I'm assuming you plan to buy one whilst you are on a trip?) from the US, but is the saving worth it? The cheapest UK D80's are from £500-520.
Hope that helps,
J