Hi folks!

Just finished building my first mixed rig: 4 Nvidia GPU, 4 AMD. Now it's time to install OS to it and I can't chose one.
Tried to search for "mixed rig os" here, found 0 relevant threads.
So, which one do you prefer and why?

Please don't suggest ethOS, I don't wanna buy before I try. I also prefer to have everything running locally without needing web to access it, so HiveOS isn't an option too. I liked SmOS very much, but setting it to work with a mixed rig is a real PITA, as it's designed for the rigs with GPUs of only one vendor.

So if you know a specialized distro that'll do its job like it should with a mixed rig, I'll be really grateful for a suggestion.
Also if you think generic Linux distro or Win7/10 are the best options in this case, please at least vote, but I'd be grateful for the explanation of pros and cons.