If it were me, I would hold off on a cooler until you see how it performs. The 2700x comes with a decent stock cooler, and the way XFR works on the 2700x, for gaming you will lose performance when you overclock. So I would hold off and see how your temps are before I bought an aftermarket cooler. But I would not go with H60. If you want liquid cooling get a 240mm radiator. The Noctua NH-D15 is one of the best air coolers on the market and will do just as good of a job.
I would also hold off on case fans. You are not getting a bad case and I would see how the NZXT case cools and the fans that come with it before I spent money that I may not need to spend.
I would stick with AMD for this build. AMD is not far in gaming performance form Intel but has a good lead in workstation task such as streaming. Also, when you move the 1440p the bottleneck moves from the CPU to the GPU, so the CPU matters even less.
You are getting a Nvidia GPU, so you want gsync. If you got a AMD GPU you would want freesync.
I swapped out the PSU as you don't need a 850watt for that rig.
PCPartPicker part list:
https://pcpartpicker.com/list/DKNQRJ
Price breakdown by merchant: https://pcpartpicker.com/list/DKNQRJ/by_merchant/
CPU: AMD - Ryzen 7 2700X 3.7GHz 8-Core Processor ($309.90 @ SuperBiiz)
Motherboard: MSI - X470 GAMING PLUS ATX AM4 Motherboard ($129.99 @ Amazon)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 Memory ($180.98 @ Newegg)
Storage: Kingston - A400 240GB 2.5" Solid State Drive ($53.83 @ Newegg Marketplace)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($58.87 @ OutletPC)
Video Card: Asus - GeForce GTX 1080 Ti 11GB STRIX GAMING Video Card ($829.99 @ B&H)
Case: NZXT - H440 (Matte Black/Red) ATX Mid Tower Case ($79.99 @ SuperBiiz)
Power Supply: EVGA - SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($69.99 @ B&H)
Case Fan: Corsair - Air Series SP120 High Performance Edition (2-Pack) 62.7 CFM 120mm Fans ($26.19 @ OutletPC)
Total: $1739.73
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-07-02 15:28 EDT-0400