My personal machine is the first and only new computer I ever bought: a 2012 Mac book air. I wanted to get a pro but couldn't justify the price. I took it in to get the battery replaced a couple of years ago instead of upgrading, again, I couldn't justify the price. I think I'll probably get the battery replaced again soon as it's started to falter. For the stuff I do in my spare time this machine is totally adequate…
Have you looked at the iPhone Mini? It is a bit bigger than the original SE but not by much!