You've got some issues here.
First don't spend $140 on a z270 board with a non-K i5-7500.
Get a $80-$100 H or B series board instead as you wont be able to overclock the processor anyway.
Second, you need DDR4 memory but you've got DDR3 chosen. The price difference will be negligable anyway so no big deal.
Third, I actually owned that Zotac 1070 AMP a few months ago and it's stupid big. It has a great cooler but so doesn't an EVGA 1070 SC for $40-$50 less money. Seriously, Zotac makes great cards but that one only fit in my case after removing my hard drive cage.
Lastly, you really don't need a 700 watt PSU. The one you have listed looks like a good unit but you can grab the 500 or 600w version instead and save $10-$15.
Other than that it looks like a great setup if you're planning on play most games at 1440p/4K or 1080p at 120+FPS.
If you're only going to play at 1080p/60 the 1070 is overkill in my opinion and a 1060 6GB would be a much better/cheaper option.
Take the money you save on the motherboard, graphics card and PSU and get a nice SSD and you'll be golden.
Just my 2 cents.
Good luck!
