If MS Office is that central to your workflow then it would be unnecessarily burdensome to be on a Mac. I bought an Asus 11.6" netbook for a variety of Windows-centric purposes, one of which is Office. It's much less hassle for me to use a $279 netbook than to wrestle with the Mac version of Offic.
At this point in time, Pages '09, Pixelmator, e-Sword (via Wineskin Winery) are central apps to my workflow. (many other apps are important to me, but they have equal versions for OSX and Windows)
If there comes a time when an OSX update prevents any of those from working, I'll be seriously looking at switching platforms.
Microsoft Office is definitely central to my workflow. Even more: in the environment I live and work, everybody uses Office and is expected to use Office, to the point that most of the people do not even know that something else exists. It is hard to replace it since it has more features than any other office suite and I have to keep compatible.
I could never use a US$ 300 netbook. To be honest, I bought my MacBook Pro because of its superior hardware. When I bought it, in June 2013, it was the only laptop that featured an IPS display with a resolution higher than Full HD. It had good components, and an SSD instead of the sluggish HDD used by most laptops. It had premium materials, and not that cheap feel of most PC counterparts. It has a great keyboard and trackpad. It has no heating issues. It is a great machine. Great hardware. When I bought it, the MacBook Pro was the only laptop that met my requirements. I set the bar high, I have to admit it.
As for software, I knew I would have to live with Office 2011 for some time, but I expected Microsoft to release a new version soon. The Windows version had come out a few months earlier, and there had been almost three years since the release of the last Mac version. How would I know that Microsoft would delay the launch for so much time? And how would I know that, after four years without a release, Apple would dumb-down iWork so that it improved its position as the office suite with less features in the whole world?
If I had to choose a laptop now, I don't know if I would buy a Mac again. Hardware is great. The problem is software. I mean, I do like OS X, it is fine. But what if I want to run other software, especially productivity software, that does not come out-of-the box?
As for the netbook thing, I would never buy one. I want an ultra-high resolution display, fast responses, premium materials, and a great keyboard and trackpad.