arnage 'box advice please

[aaak]

I've been looking at (from a distance only so far) a 2005 arnage.
I came across a review for the 2006 model which slated the previous 4 speed gearbox. I would appreciate any advice on whether I'm (much) better off moving on and finding a 2006 model, or whether, not having even driven a bentley before, the older box is 'fine'. Many thanks