Seefree iPhone SE is literally the same screen that was on an iPhone 5S. If you can use an iPhone 5S, you can use an iPhone SE.
The 7+ and 8+ are pretty similar. I think some people like the 6+/6S+ better than the later models. I find the 7+ tolerable for short periods, better with a matte film, and generally "ok" for light use but can't read on it for extended periods (in excess of as long as it takes to look up directions somewhere or text someone).