If you decide you will buy in the US, you must decide whether you will test ride in Sweden, knowing you have already decided not to buy the bike from that shop.
If you buy in the US, you might want to plan a couple of days test riding near the shop before taking off across country. Any bike can have a manufacturer's defect. Any shop can make a mistake assembling the bike. A problem might not be detected until you load it up and hit the road.
No matter how heavy or light your gear, your bike will end up taking quite a pounding during your tour. I'm partial to steel frames because I think they do the best job of handling bumps in the road.