Some very minor changes that I would recommend. They have added to the cost a little but from where you started it's not much more.
For what it's worth I think you're making the right decision all in. The 8 core CPU will give the best performance when DX12 starts to get used properly with FS2020, it'll also have a big impact on your video editing. The 3800X, as suggested, would be a non-starter. I know you have blown your initial budget right out the window but you have ended up with a PC light years ahead of the one that you started with. I don't think you'll need to change the CPU for the lifetime of the build (5-10 yrs I would estimate) but you will definitely go through a GPU or 2. With that in mind I think the only thing left to upgrade right now would be the PSU to a 1000w RMx. The new GPUs are going to use more and more power so having plenty of headroom right now, so that you don't need to switch it out at all, is a sound choice. Otherwise this is a beast of a build.
Case
LIAN LI LANCOOL II GAMING CASE
Processor (CPU)
AMD Ryzen 7 5800X Eight Core CPU (3.8GHz-4.7GHz/36MB CACHE/AM4)
Motherboard
ASUS® STRIX B550-F GAMING (DDR4, USB 3.2, 6Gb/s) - ARGB Ready!
Memory (RAM)
16GB Corsair VENGEANCE RGB PRO DDR4 3600MHz (2 x 8GB)
Graphics Card
8GB NVIDIA GEFORCE RTX 3070 Ti - HDMI, DP, LHR
1st M.2 SSD Drive
500GB SAMSUNG 980 PRO M.2, PCIe NVMe (up to 6900MB/R, 5000MB/W)
1st M.2 SSD Drive
1TB INTEL® 670p M.2 NVMe PCIe SSD (up to 3500MB/sR | 2500MB/sW)
Power Supply
CORSAIR 850W RMx SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable
1 x 1 Metre UK Power Cable (Kettle Lead)
Processor Cooling
Corsair H100i RGB PRO XT Hydro Series High Performance CPU Cooler
Thermal Paste
STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Network Card
10/100/1000 GIGABIT LAN PORT
Wireless Network Card
WIRELESS INTEL® Wi-Fi 6 AX200 2,400Mbps/5GHz, 300Mbps/2.4GHz PCI-E CARD + BT 5.0
USB/Thunderbolt Options
MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating System
Windows 11 Home 64 Bit - inc. Single Licence [KUK-00003]
Operating System Language
United Kingdom - English Language
Windows Recovery Media
Windows 10/11 Multi-Language Recovery Image - Unlimited Downloads from Online Account
Office Software
FREE 30 Day Trial of Microsoft 365® (Operating System Required)
Anti-Virus
NO ANTI-VIRUS SOFTWARE
Browser
Google Chrome™
Warranty
3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour)
Delivery
STANDARD INSURED DELIVERY TO UK MAINLAND (MON-FRI)
Build Time
Standard Build - Approximately 13 to 15 working days
Price: £2,157.00 including VAT and Delivery
Unique URL to re-configure: https://www.pcspecialist.co.uk/saved-configurations/amd-am4-gen3-pc/KT4np5sz6r/
For what it's worth I think you're making the right decision all in. The 8 core CPU will give the best performance when DX12 starts to get used properly with FS2020, it'll also have a big impact on your video editing. The 3800X, as suggested, would be a non-starter. I know you have blown your initial budget right out the window but you have ended up with a PC light years ahead of the one that you started with. I don't think you'll need to change the CPU for the lifetime of the build (5-10 yrs I would estimate) but you will definitely go through a GPU or 2. With that in mind I think the only thing left to upgrade right now would be the PSU to a 1000w RMx. The new GPUs are going to use more and more power so having plenty of headroom right now, so that you don't need to switch it out at all, is a sound choice. Otherwise this is a beast of a build.
Case
LIAN LI LANCOOL II GAMING CASE
Processor (CPU)
AMD Ryzen 7 5800X Eight Core CPU (3.8GHz-4.7GHz/36MB CACHE/AM4)
Motherboard
ASUS® STRIX B550-F GAMING (DDR4, USB 3.2, 6Gb/s) - ARGB Ready!
Memory (RAM)
16GB Corsair VENGEANCE RGB PRO DDR4 3600MHz (2 x 8GB)
Graphics Card
8GB NVIDIA GEFORCE RTX 3070 Ti - HDMI, DP, LHR
1st M.2 SSD Drive
500GB SAMSUNG 980 PRO M.2, PCIe NVMe (up to 6900MB/R, 5000MB/W)
1st M.2 SSD Drive
1TB INTEL® 670p M.2 NVMe PCIe SSD (up to 3500MB/sR | 2500MB/sW)
Power Supply
CORSAIR 850W RMx SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable
1 x 1 Metre UK Power Cable (Kettle Lead)
Processor Cooling
Corsair H100i RGB PRO XT Hydro Series High Performance CPU Cooler
Thermal Paste
STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Network Card
10/100/1000 GIGABIT LAN PORT
Wireless Network Card
WIRELESS INTEL® Wi-Fi 6 AX200 2,400Mbps/5GHz, 300Mbps/2.4GHz PCI-E CARD + BT 5.0
USB/Thunderbolt Options
MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating System
Windows 11 Home 64 Bit - inc. Single Licence [KUK-00003]
Operating System Language
United Kingdom - English Language
Windows Recovery Media
Windows 10/11 Multi-Language Recovery Image - Unlimited Downloads from Online Account
Office Software
FREE 30 Day Trial of Microsoft 365® (Operating System Required)
Anti-Virus
NO ANTI-VIRUS SOFTWARE
Browser
Google Chrome™
Warranty
3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour)
Delivery
STANDARD INSURED DELIVERY TO UK MAINLAND (MON-FRI)
Build Time
Standard Build - Approximately 13 to 15 working days
Price: £2,157.00 including VAT and Delivery
Unique URL to re-configure: https://www.pcspecialist.co.uk/saved-configurations/amd-am4-gen3-pc/KT4np5sz6r/