Jeffers, I am going to either wait, as there is a a lot of stuff coming - ie: Rockchip Libreelec build(s), new Amlogic processors, or consider an S905D processor/box. S905D are a bit hard to find and more expensive than S912. The curious thing is that the Mecool and Magicsee units show lan as 10/100, so no 1000.
In the end, I have had lots of advice to skip the S912.
I have a 3x S812 boxes that are running great on Demetris's 8.2.2 build and he is shortly going to release Leia builds when it goes Beta. That will keep them alive until Kodi 19 I guess. I also have 1 S905X box (Mecool M8S Pro+) which runs really well and 2x S905W boxes I will likely get rid of.
So I don't need anything now but like to play with new tech.