Info on the Amazon.com referred to the global version being the "UK version", so I've placed an order for the 8GB version on Amazon.co.uk. Including a Gel case, screen protector, and a couple of stylus pens comes to $278 delivered. Estimated delivery 17-19th Dec, using the cheaper of the two shipping options.
I've got a Defy at the moment with 2GB memory, and I have 740MB free, so no need to get the 16GB version :)
Thanks for your help Timmmay