Any suggestions for a new PC?

Refined your build a bit.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 7 1800X 3.6GHz 8-Core Processor ($419.99 @ Amazon)
CPU Cooler: NZXT - Kraken X62 Rev 2 98.2 CFM Liquid CPU Cooler ($159.99 @ B&H)
Motherboard: Asus - CROSSHAIR VI HERO (WI-FI AC) ATX AM4 Motherboard ($269.99 @ B&H)
Memory: Corsair - Vengeance LPX 32GB (2 x 16GB) DDR4-3000 Memory ($259.99 @ Best Buy)
Storage: Samsung - 960 Pro 1TB M.2-2280 Solid State Drive ($578.99 @ Newegg)
Storage: Hitachi - Deskstar NAS 4TB 3.5" 7200RPM Internal Hard Drive ($134.96 @ Amazon)
Video Card: Asus - GeForce GTX 1080 Ti 11GB STRIX GAMING Video Card ($784.98 @ Newegg)
Case: Corsair - Crystal 570X RGB ATX Mid Tower Case ($179.99 @ Amazon)
Power Supply: SeaSonic - PRIME Titanium 750W 80+ Titanium Certified Fully-Modular ATX Power Supply ($166.69 @ SuperBiiz)
Sound Card: Creative Labs - Z PCIe 24-bit 96 KHz Sound Card ($69.99 @ Amazon)
Case Fan: Corsair - SP120 RGB High Performance 52.0 CFM 120mm Fan ($17.00 @ NCIX US)
Keyboard: Corsair - K95 RGB PLATINUM Wired Gaming Keyboard ($169.99 @ Amazon)
Mouse: Logitech - G900 CHAOS SPECTRUM Wireless Optical Mouse ($108.93 @ Amazon)
Headphones: SteelSeries - Arctis 7 Headset ($149.99 @ Amazon)
Total: $3471.47
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-09 06:56 EDT-0400

Changes made
MoBo: none -> Asus ROG Crosshair VI Hero (Wi-fi AC)
HDD: Seagate (2TB) -> Hitachi (4TB)
GPU: Asus GTX 1080 Ti FE -> Asus GTX 1080 Ti ROG Strix
PSU: EVGA SuperNova G2 (850W) -> Seasonic PRIME 750 80+ Titanium (750W)
Case fan: Noctua NF-F12 PWM -> Corsair SP120 RGB

Reasons why
MoBo: Picked top-of-the-line MoBo for your workstation build that comes with built-in wi-fi, plenty of rear USB ports and Aura Sync RGB.
specs: https://www.asus.com/Motherboards/ROG-CROSSHAIR-VI-HERO-WI-FI-AC/

HDD: 2TB can be a bit less for your work, so replaced your HDD with 4TB NAS drive from the most reliable HDD manufacturer, Hitachi. NAS drives are designed to operate 24/7 and they are far more reliable than common desktop HDDs.
You can switch your HDD back and save about $75 if you like.

GPU: While FE (founders edition) GPU is the cheapest of the bunch, it's clock speeds and cooling performance is also the lowest. So, switched out your GPU with Asus ROG Strix one that has 3x fans for cooling and you can also sync it's LEDs with your MoBo by using Aura Sync RGB.
specs: https://www.asus.com/Graphics-Cards/ROG-STRIX-GTX1080TI-11G-GAMING/

PSU: 850W is a bit much for your system and so, replaced your PSU with the best 750W PSU money can buy at current date, a Seasonic PRIME 750 80+ Titanium. PRIME series is the best which is offered by Seasonic and these units are also the only ones in the world that come with 12 years! of warranty.
review: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=481
My Skylake build is also powered by Seasonic PRIME 80+ Titanium unit but mine is 650W. Full specs with pics in my sig.

Case fan: While Noctua fans are good, it's beige/brown coloring ruins the clean look of your build. To keep your build looking clean, replaced the fan with Corsair SP120 RGB for mounting as rear exhaust. You'll also get 3x SP120 RGB fans with your 570X case and since Corsair RGB LED controller supports up to 6x Corsair RGB fans for LED control, you can plug your 4th SP120 RGB fan into there for unified LED light show.

As far as peripherals go (KB, mouse, headset), those are personal choices and it's hard to suggest you something else.
Though, about KB and Cherry MX switches: MX Brown switches have a tactile bump in them and you may or may not like it. I too thought about going with MX Brown switches when i was looking for mechanical KB. While on paper, the MX Brown switches do look good, in reality (after testing each switch type out at the PC hardware store), i didn't like the tactile bump. So, i ended up going with Cherry MX Silent switches with my Corsair Strafe RGB KB. MX Silent switches have the same feel as MX Red switches but they are much quieter.
So, before buying a mechanical KB, try out different MX switches to find the best for you, if you haven't done so already.


Since choosing a case is completely a personal choice, OP is free to pay as much as he desires for a case that likes him the most.