John,
I can undoubtedly say that you are better off buying your Rive box from the UK. I have lived in Belgium for the past 2 years and although I bought my Rive ST from here nearly 2 years ago (Exchange rate was then 1.35 and Rive hadn’t put their prices up)I still buy all my trays/winders/accessories from the UK as it is much cheaper.
For instance I have just looked on the Nathans website and they sell their D25 ST Club for 539.90, the price of one that I saw in the tackle shop I use over here last week was nearly 650 Euros. So it is more expensive after the exchange rate before you take your travelling costs into account.
As Joffy has said, I would consider buying sooner rather than later as I think the VAT increase will be upon quite soon.
Hope this helps,
Steve