Paul... never compromise - if you have the money
For Als: I think that the QuickSync hardware is the same over the whole Skylake/Broadwell generations, so the intel SIP core won't be an improvement over what a GTX960 SIP core has to offer today (in what is related to 4K encoding).
You can keep the present CPU and add a GTX1070 (same NVENC hardware as in GTX1080, improved speed compared to GTX960).
The video editing software scales well with the number of cores, unlike games (that are limited in the number of cores they can use). A lot of oppinions online about CPU performace are based on gaming needs (not more than 4 cores, higher frequency), so you have to filter those out.
And wait for the next true CPU upgrade:
http://www.fool.com/investing/2016/06/09/why-did-intel-corporation-delay-this-gaming-proces.aspx
This message was edited 5 times. Last update was at Jun 19. 2016 09:35