I use Revit and Magicad (currently student) and i'm having trouble with computerspeed. I was thinking of buying a new workstation computer and would input on the hardware needed. For example I'm unsure whether I should go for a CPU with more cores or more clockspeed. As I understand it the former is preferred for rendering and the latter for modelling (?) 

I was thinking of going for something like one of these two:

https://www.cgdirector.com/pc-builder/?=re1Bg0h0ehb

https://www.cgdirector.com/pc-builder/?=aa1xbc00ahf

They also pretty much match my max budget. 

I would really like some input on the two configurations, any changes to them or any advice at all, thank you. I should emphasize that I don't mind building it myself.

BR Jonas