Im curious, why would you run Windows on a Mac?
Several reasons:
1) When I was looking to replace my old XP laptop I wanted Windows 7 - but at that time Microsoft only was shipping Windows 8 computers (a few months later they released Windows 7 again, alas it was outside of my time frame). Buying a Mac and installing Windows 7 was the only way for me to go at that time.
2) I do a lot of computer consulting and that includes overseeing the AV/technical aspects of a few conferences each year. My computers are used for several days to supply the feeds to the projectors (I do not own a projector). Every year there is a MD that has his/her presentation in Keynote - as opposed to PowerPoint - BOOM - The same computer natively displays the presentation without issue.
3) When I am in my office I have two, and occasionally three, monitors up and running - I almost always have both Mac and Windows programs open and it is extremely easy to move data between them.
Hope this helps.