Well since you are going to buy outside the US, perhaps a 2 cycle would be best. Though I don't know if they are available in Europe though. They are much lighter, simpler and tend to be more reliable. Heck I would take a good used 2 cycle over a new 4 any day even if they were the same price. The 4 cycles do get a little bit better fuel mileage and tend to be a bit smoother, but for raw reliability I don't think you can beat a 2 cycle. They are available in the Caribbean, but not sure about what is available in Ireland or Greenland.
I think any of the above should be reliable if taken care of. Keeping the fuel clean is most important, and if you can get alcohol free you will be way ahead of the game.
I think any of the above should be reliable if taken care of. Keeping the fuel clean is most important, and if you can get alcohol free you will be way ahead of the game.