The simple answer is that you get a tax exemption on the first $90K that you make. I only had to worry about those simple situations myself but that credit can make a difference. I'm going to submit a revised 1040 for my 2008 return claiming my exemption and that gets me back $1K in US taxes for only a small change in my taxable income (~$6K).
Anyway, I would say do it if you feel that you are in a position to do so. The longer you wait, the harder it will be in the future as you become entrenched in a community with assets and possessions. You can ship stuff but I think you just need to be judicious about what you send and what you choose to buy while you are over there. High value small items like electronics are your best bet to mail and alot of items now have universal transformers. My laptop, toothbrush, razor, cellphone and Kindle all worked overseas and back home. Also, keep in mind the added costs of import and taxes of buying things in Austria. It may be cheaper to ship electronics that you own in the US over. Even when I lived overseas, I found it cheaper to order a lot of my stuff from the US as opposed to buying locally (and I lived in a free port).
But if you are going to go back to the States in a few years, think about storing some items if you can get a relative to store them for you. I just came back stateside this year and although I stored a lot of my stuff, I still spent a lot of money rebuying stupid little things that I did not think were worthwhile. I probably spent $1K over what I budgeted when I came back for things like kitchen items, dishes, vacuum cleaner, household cleaners, linen, etc. The same can be said on how you should budget when you move out there. You're going to have to buy a lot of little things and groceries when you get over there.
Also, be sure to line up international banking ahead of time. My biggest headache was banking when I left because I had to apply for new bank account. So I could only draw what little cash I could from the ATM from my old bank until I got my first paycheck deposited. Ended up just having to loan a grand from my colleague to pay my apartment down until I could get my first paycheck cashed. Then there was the problem that my bank wouldn't touch foreign checks for the first 6 months. So all the refunds from my utilities and whatnot went to waste. Exchange rates for me were not a problem because my currency was effectively pegged to the US Dollar.