Thanks for all the answers.
Not interested in GPU mining - it can't be cost effective to keep my main rig on 24/7 mining with my 1070.
It could be. Look at whattomine.com, go to the GPU tab and put in 1 1070 with your power costs. You can see what you would make in a day. Then you can model what 2 or 3 or 25 GPUs will bring and make some decisions. But understand that the numbers you get are only a snapshot in time. Many factors affect mining income. There are plenty of resources here to help you understand what those factors are.
Building a mining rig with 4-6 GPUs is too big of an investment, too much Power costs, too noisy, too hot for my apartment.
I guess the conclusion here would be to wait & be informed when new products similar to the Baikal cube will be out.
Trust us when we say that you won't just stop at one Baikal cube. You will get the mining bug and expand. Especially if you do happen to get one and realize that you are going to be facing a steep difficulty rise over the next few months with all the other much more powerful X11 ASICs coming online.