Hey Morkrock, great post! I'm very happy to hear you've chosen to go with an AMD Ryzen cpu!
I'm currently in the process of saving up to upgrade my fx8300 to a Ryzen as well. In fact, I was thinking of choosing the same exact motherboard too. I really like the orange accents (which can be turned off), and have become a fan of Aurous products (even though I've never owned one). I'd go with an Asus board if it didn't seem like they had some issues, but from my research is appears most Ryzen boards have some issues to some degree. But, again, from my research, it seems like these Gigabyte boards are one of the best choices right now, for under $200.
Personally, if you can hold out and save an extra $20-30, go with the Ryzen 1700x. Even before the Ryzen 2 cpus were announced and AMD cut the prices on Ryzen 1, I consistently saw the 1700x at $300 or $290, the original MSRP of the regular 1700. You'll get a bit more clock speed without having to overclock yourself (which I'd probably rather not mess with myself), and imo, the 1700x will have a better resale value because you have the "more badA" chip.
As for your question on the graphics card, here is my 2¢: go with the 1070 man. While the 1050ti is a solid card, you'll be much happier with the 1070 in the long run. You'll have better day to day performance, better thermals (2 cards will produce more heat and be harder to dissipate), likely have better hash rate, AND have better resale value later on. In all likely hood, you'll get a better stack of cash for the one card in say 2-3 years than you will from the 2 cards in the same time. My reasoning? I have a 960 2gb and isn't worth what my 980ti is, obviously. My point being, more powerful cards hold their value better. I also didn't mention with the 1070 you'll have more VRAM, which will help with high resolution gaming, modding, and other related things.
The 1070 is definitely pricey right now like all cards, but if you can get a 3rd party card like an EVGA, Gigabyte, or Asus you'll be doing good. I bought my 980ti used for like $250 years ago (yes, I got a slammin deal, along with using some Amazon gift card money), which was far less than brand new. If you feel comfortable with buying used, go for it. Nowadays it may be best to buy new since you can't be sure how used a card really is.

Overall, I think you are on the money with your build! You have the NVME which will be blisteringly fast, good RAM (which is also expense these days), and a solid decision between good graphics. No matter whether you choose to go with the 1700 or 1700x, I think you'll be very satisfied. Perhaps look into a liquid cooler in a few months or so, it's what I'd be using if I had a Ryzen right now.

P.S. Do note that from my research, if you go with a 1700x, you won't get the wraith cooler. When I was doing some searching around I couldn't find a 1700x that included the cooler, so keep that in mind if you go that route, that you'll need an aftermarket cooler. Best of luck with your build, happy gaming!