you didn’t mention screen size … nevertheless here is a link to an earlier post I made describing my setup…
you spec is quite highend… it will not have a problem with SketchUp…
re workstations… I am not convinced they have any tangible benefit for everyday use considering the premium… but others may argue differently…personally, I would stick to mainstream machines and avoid the bleeding edge or niche hardware…
The less often spoken risk is that extreme machines may allow you to do high load calculations but few others will be able work with your files, you get spoiled and sloppy with the power at your fingertips…
I have a GTX1070 in my notebook… the next generation GTX 2000 series is about to be released for mobiles with significant graphics performance benefits in VR visualisations but frankly the current second top tier notebooks are fine and the new cards you may have 2-3 months wait…
hope that helps