I have been using NeoVim for half a year and have not looked back. It is backward compatible (completes Vim test suite successfully) and brings some other goodies, such as async jobs (I know Vim 8.0 has these but they have been in NeoVim since I switched) and a great terminal emulator. It has much better defaults that I did not know about when I was using Vim. Honestly - give both a try - installing NeoVim, all you have to import your settings is to symlink your .vimrc to .nvimrc, as far as I remember