Yes, for the most basic use, a 6th Gen CPU should be enough. Whilst you at it though, an i7 6th Gen would generally be a better bet than an i5 6th Gen. For your information, I still use a 5th Gen i7 laptop for office work when I'm at home, and aside from the battery being dead, the laptop is able to handle most of my tasks satisfyingly. Of course, there's more to laptop performance than CPU alone (e.g. RAM, etc.). But again, we're talking about very basic usage here, so you should be fine with your affordable option.