This relates to my work laptop. I don't have W7 on anything at home.
1) I have Nvidia drivers, and my displays behave themselves. YMMV, it seems.
2) Yeah, this is probably fuckery.
One of my big problems with OSX for work-related stuff (when I tried it) is that for better or worse, a lot of people (my organisation, all its customers, all their customers, etc) use Outlook, and Outlook for OS X is arse.
There were weird incompatibilities between Excel for Mac and Excel for Windows, too, usually related to conditional and format-as-table formatting, both of which I use a lot. I don't remember the details but I'm sure that according to the documentation, some of that shit should have worked.
Also, we seem to be sprouting Visio documents all over the place. I hate Visio, and so does your Mac. Omnigraffle is OK for simple stuff (and it's certainly nicer to use than Visio), but anything with any complexity turns into a hot mess.