You are going to have absolutely no problems. ATM, I'm running two US Seven's at home and four at work, have never had a problem with installation.
I buy all my non-German OS's and software in Finland, for private and work. Although bought outside USA, they are completely normal US editions. They run perfect, being a foreign edition brings no problems.
The EU browser ballot has nothing to do with installation; it comes when you do the first update but only if you have IE as the default browser. To avoid this ballot completely, you just have to do two things: first, when Windows installation asks if you would like to connect to Internet to get the latest updates before installing, answer NO. Second, as soon as the Windows is installed, before you let it install any updates, download and install any browser other than IE and set it up as your default browser. This way you never see the ballot.
Even if you choose to let Windows installation to connect to Internet, or you like to use IE as a default browser thus causing the browser ballot to appear, you have nothing to worry. It's just a a browser ballot, nothing more. As I mentioned, it has nothing to do with installation, or which national or language edition you install. Any Windows installed on any computer which the IP shows is physically located in the EU at that moment of the installation, get's this ballot. But, as I said, only if the IE is the default browser.
Confusing? Believe me, it's not. It's quite straight forward.
Kari
EDIT: For your wife's CBS & ABC needs:
http://hotspotshield.com/, I'm using it to watch
Hulu :
This one does not need any proxys:
http://pages.tvunetworks.com/watchTV/index.html