How to build a powerful computer for photo editing

One of the neverending stories in the world of photography, is the Mac vs Windows debate. Well, this is not a fanboy post from either side to fuel that debate. This is a post for those looking for advice on how to get or build (DIY) a powerful workstation for editing photos in Photoshop CC, Capture One and Lightroom. I have used both platforms, and just want to share my honest opinions, as well as give you some advice and my parts list for building a pretty powerful beast of a machine for editing photos.