UK is like my #1 country I ship to now I almost send more there than I do here in the USA.
Personally I suggest getting the Zhanchi. From my site it is $17.25 DIY (I will have white again in a few days) with free shipping. So if you're looking for the best cube out of the box I suggest Zhanchi.... I also have Guhong's for $14.95, still an awesome cube that turns out great after breaking it in (or doing some mods).
I remember 1 year ago the AV, FII, and Guhong were all the same popularity But the Guhong took over.