I have an OS X Notebook - Current Model Air. (and several of the previous iterations of Air/Pro/Mini etc)
And while I have yet to re-install VMWare Fusion, I used to seamlessly switch between a desktop that was "Apple" and a desktop that was "Windows 7"
Within both, my "Desktop" "Documents" etc are shared seamlessly, what I save in one, is there on another.
You will find that if your running Office 2011 that it doesn't have features or capabilities you would expect in Office 2010 - one of the reasons I have both setup and running.
In terms of compatibility, it works in an Enterprise Win2008 R2 Domain (aka I can access all resources) although we have a Mac Mini that provides printing to OS X Devices. If I can't do something in Office 2011, I slide across to Office 2010 in VMWare. I can get out to the internet, authenticate to the Radius Server for Enterprise Class Auth, and I can do everything I need to at work. This is including connecting to an Exchange 2010 server natively in OSX.
If I need a program to run that doesn't run on OS X (access, publisher, visio) I switch to Windows. And I can do all of this, with iTunes, Mail, Calendar etc open in OSX and Word or Visio 2010 running on Windows, and switch between (inc copy/paste)
Simply put, if your happy with the look, feel, design of the computer, make your choice. An OS X Device can run both, either independently or simultaneously.
You may not be prepared to pay what many people call the "Apple Tax" but then, I don't consider an Apple Device to be equivalent to the cheapest PC available on the market. I consider it to be similiar to the high end "ultrabooks" such as the higher end Sony, or HP Envy's etc which have similiar setups (including the reduced feature sets etc)
That said, I support both platforms at work, and linux to the best of my knowledge (+ a few google searches)