For the relatively light usage you suggest you need, I would say a chromebook may fit your needs very well. It's all online-based, so generally you don't install any software per se, which makes the setup and operation a lot simpler than most computers.
Google Docs should more than meet your needs for a Word replacement, most likely. You might also enjoy their speedy boot/load time.
I've currently got two (fair disclosure: due to my employment, I may be biased) at home, and would be happy to answer any questions you might have.