Price difference between buying a bike in Europe (Austria) vs USA?
I would be in favor of waiting until you move. There is the possible problem of needing service work under warranty and the nearest dealer being some distance away. You must also factor in the shipping cost  along with the expense of disassembly and reassembly if you can't do it yourself. There is also no better way to start a good relationship with your local shop than by buying two bikes. The other advantage is being able to check out the terrain and see what type of bike you need.