An e-ink display is a little bit easier on the eyes for text, but an iPad with colors inverted and brightness turned all the way down is not much worse. I'd go with the iPad, especially if there is any other reason you'd want an iPad apart from reading, because despite its downsides, it is much easier to highlight text, look things up, and make notes. If I'm going to carry a Kindle I might as well carry a paper book or magazine, which I tend to like most of all. Also, Apple News+ is actually really good for magazines, and I get it anyway with their services bundle.