Help which version of the z10 should i get?

Trying to choose which version of the z10 to get. This is a bit challenging due to the fact that i travel alot for work.

Basically, I live in the Caribbean but travel frequently to the US for work, and somewhat less often (but still regularly to the UK and Europe). I have to be in france for 5 weeks at some point in the near future for work. So...

In Antigua where i live currently they have launched the STL100-2 and they have told me they will also be bringing the -3 as well probably in the next batch they get. Aside from Antigua i also spend a lot of time in Barbados (the STL100-1) launched there.

From my research the 100-1, 100-2, and 100-3 should all work in the Caribbean fine.

I have narrowed my search to the 100-2 and the 100-3.

Given the fact that i travel to both the US and UK/Europe which one would be better? the -2 or the -3 and of the -3s i assume the RFK121LW would be preferable? A lot of the time when i travel i do not bother to switch sims and just data roam, however if in the US or UK/Europe for extended lengths i will usually pick up a prepaid sim with data. Given that i have the 5 week trip to France coming up i will defiantly be doing that then.

Suggestions?