May I ask why do you need a Mac if you're only mostly doing word documents?
I completely agree with this! and I would say a Windows laptop would be a way better deal for just doing word documents. You could even get a decent 17 inch laptop for less than 2/3 the price of a 2015 15 inch Mac.
For me personally, my Mac is my all in one and I find it more enjoyable to use than any Windows laptop. I use it as a desktop (connect it to a bigger display, with a mouse and keyboard), I use it as a laptop, I play games on it and I need decent power. I also use it for basic things such as web browsing and word/excel documents and editing photos, I also have Parallels desktop and I can run Windows whenever I need to use a program that my Mac doesn't support.
My biggest advice is to think about what you use the computer for and buy one according to your usage.
A base 2015 15 inch Mac is a good amount cheaper than a 2016 15 inch Mac ($1,999 compared to $2,399)