Just like you went for one of the best cars in your garage which might be the Bugatti Veyron, here's a very high PC.
Let's start with this one. https://www.overclockers.co.uk/8pack-orionx-dual-system-extreme-overclocked-pc-intel-core-i9-7980xe-and-intel-core-i7-7700k-fs-006-8p.html
Now that's going to grind through almost any GIS today.
I typically run multiple GIS databases at once and have dual monitors in order to conduct analytics. I'm looking to upgrade and looking for specifications on best GIS/engineering grade desktop pc for what I'm doing.
I'm a bit impatient and like things to process fast. so I'm looking for guidance on what's needed regarding CPU's, processors, graphics cards, RAM....
Any help will be appreciated.