Upgrading PC parts

[rser]

Hey, I've been looking at upgrades I'll be buying for my PC and I've been wondering if it's any good and if they're all compatible, I'll make a list of what I'll be buying

Ram - Corsair Vengeance LPX 16GB 3200MHz
Power Supply - EVGA Supernova 850w 80+ Platinum
Mobo - GIGABYTE Aorus GA-Z270X- Gaming 9
CPU - Intel i7-7700k with Noctua DH-15 6 cpu cooler
HDD - Seagate 2tb FireCuda SSHD
Case - Cooler Master Cosmos II
That's the list so far, I've already got a NVIDIA GTX 1070 but I'll also be buying the Asus Rog Swift PG279Q 27" IPS monitor and the resolution is 2560x1440, should I buy another 1070 and go SLI? And do you recommend any other cases? I'll most likely be using fans to cool everything down as I'm paranoid about watercooling

EDIT : I've fixed the shopping list and replaced the MOBO + CPU

 

[blankcr8]

Do you have a cpu cooler? The ryzen 7 1800x doesn't come with one. You can also save $100 by getting a 1700x and overclocking to 1800x speed

 

[rser]

Do you have a cpu cooler? The ryzen 7 1800x doesn't come with one. You can also save $100 by getting a 1700x and overclocking to 1800x speed

Going with the Gigabyte Aurous mobo with the Intel i7-7700k cpu and a Noctua DH-15 6 cooler, think this build is better?