I have debated this issue for a while as to what camera to replace my 7D purchased from new in 2009.
Over the last few years I followed canon rumours about the 7Diii and that was going to be my next purchased, and we know what actually happened !
So i was on the hunt for a viable replacement and I researched many cameras and I ended up getting the EOS 7Dii ! !
Bang for buck the 7Dii is a good buy for AF accurancy, build quality, thumb dial, Dual pixel AF for video, 2 card slots is ideal as you can buy an SD card most places around the world !
I managed to get a very good deal used 7Dii on here for just over £500 a few years ago and now the prices have risen since then. The 7Dii is suited for sports & wildlife were the 80D & 90D are more general purpose as they do not have the same wide coverage of AF points as the 7Dii