Szabo Gergely

damn... i wouldn't do that board with a 3800x, step down to the 3700x and something like a tomahawk

For creating models for games you have to become a minimalist. On a low end computer playing at low quality the geometry still has to be loaded in. 
 
When I created content for games I used a "nice" computer for 3D Max and PhotoShop but ran the game engine on a minimum spec machine(older computer). I did this because I spent most of my time creating and testing textures. The next time consuming task was testing and tweaking animations over and over again.
 I had the 3D program and paint program running and I needed the game engine running as well since I had to see the changes I made in real time.      
 
So get what you like, because it really does not matter. You are not your audience. Keep your old rig for testing because it better reflects your audience. 
 
That said. I would get a big SSD for you new computer and 32 gbs ram so your paint program won't boge down. I would also get more GPU power to run these monitors. You can see what I like to use.
 
I prefer doing 3D on a 16:9 4k monitor. I prefer playing games on a 21:9 monitor and that is why I have both. The 4k monitor is to help find and fix errors that either I or the 3D program made. 3D Max screwed up all the time.
 
Good luck with you new setup.
 
 
 
 
  
 
 
 
  
 
 
 
 
 

Idealy you're going to want a case with a bit more airflow. This is a workstation PC, so the CPU is going to be used quite a lot and generate a good bit of heat. You'll also want a good CPU cooler too.
 
PCPartPicker Part List Type Item Price CPU AMD Ryzen 7 3700X 3.6 GHz 8-Core Processor $329.99 CPU Cooler be quiet! Dark Rock Pro 4 50.5 CFM CPU Cooler $89.90 @ Amazon Motherboard MSI B450 TOMAHAWK ATX AM4 Motherboard $114.99 @ Best Buy Memory Patriot Viper Steel 16 GB (2 x 8 GB) DDR4-3600 Memory $99.99 @ Amazon Storage Intel 660p Series 1.02 TB M.2-2280 NVME Solid State Drive $94.99 @ Amazon Video Card EVGA GeForce RTX 2060 SUPER 8 GB XC GAMING Video Card $449.89 @ OutletPC Case Fractal Design Meshify C ATX Mid Tower Case $93.98 @ Newegg Power Supply Corsair TXM Gold 550 W 80+ Gold Certified Semi-modular ATX Power Supply $73.88 @ OutletPC   Prices include shipping, taxes, rebates, and discounts     Total (before mail-in rebates) $1367.61   Mail-in rebates -$20.00   Total $1347.61   Generated by PCPartPicker 2019-08-12 11:30 EDT-0400   RAM isnt RGB, but it's 3600 speed with 17 cas latency which is pretty tight (though you can find even lower ones like 15, but not at this price)

Personally I'd go with a much less expensive case, a lower capacity psu, and a 3700X cpu.
 
The case is quite expensive, based on pcpartpicker.com about 18% of the total build cost. It is also ATX and the motherboard is only mATX and will look a little lost in the larger case.
 
Performance of a stock 3800X is only a bit better (~10%) than that of a stock 3700X. It is hardly worth the ~20% price premium. 
 
A 550W psu is more than enough capacity for the build with an allowance for upgrades and overclocking.
 
Adding a 1TB NVMe drive will improve load times and overall performance.
 
PCPartPicker Part List
CPU: AMD Ryzen 7 3700X 3.6 GHz 8-Core Processor  ($329.00 @ B&H) 
Motherboard: MSI B450-A PRO ATX AM4 Motherboard  ($95.95 @ B&H) 
Memory: G.Skill Trident Z RGB 16 GB (2 x 8 GB) DDR4-3200 Memory  ($104.99 @ Amazon) 
Storage: Intel 660p Series 1.02 TB M.2-2280 NVME Solid State Drive  ($94.99 @ Amazon) 
Video Card: EVGA GeForce RTX 2060 SUPER 8 GB XC GAMING Video Card  ($449.89 @ OutletPC) 
Case: Corsair SPEC-06 ATX Mid Tower Case  ($98.99 @ Newegg) 
Power Supply: SeaSonic PRIME Ultra Gold 550 W 80+ Gold Certified Fully Modular ATX Power Supply  ($108.99 @ SuperBiiz) 
Total: $1282.80
Generated by PCPartPicker 2019-08-12 10:44 EDT-0400

PCPartPicker Part List
CPU: AMD Ryzen 9 3900X 3.8 GHz 12-Core Processor  ($499.00 @ B&H) 
CPU Cooler: be quiet! Dark Rock TF 67.8 CFM Fluid Dynamic Bearing CPU Cooler  ($89.99 @ SuperBiiz) 
Motherboard: ASRock X570 Steel Legend ATX AM4 Motherboard  ($189.99 @ Newegg) 
Memory: Team Vulcan 16 GB (2 x 8 GB) DDR4-3000 Memory  ($67.89 @ OutletPC) 
Video Card: MSI GeForce RTX 2070 8 GB Video Card  ($429.89 @ OutletPC) 
Case: Lian-Li PC-O11 Dynamic ATX Full Tower Case  ($127.99 @ Adorama) 
Power Supply: Corsair TXM Gold 650 W 80+ Gold Certified Semi-modular ATX Power Supply  ($74.99 @ Newegg) 
Total: $1479.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-08-12 09:52 EDT-0400