I’d go with a mx100 512gb instead of the 850evos. And id choose a 980gtx as the 970gtx has a crippled memory bus. Finally i’d exchange socket 2011-3 in favour of 1150 (4790K) and use a 450w PSU.
Ah: and a 27" 1440p monitor.
I’d go with aircooling too.
any huge reason for an internal sound card instead of an external interface with a better price/value?
Why do you need DDR4, if it would be my setup I would go with DDR3 and invest the savings in a 980.
Do you care about color depth and color authenticity (calibrated)?
Do you plan on letting the SSD’s run in a raid?
Ever thought about a silenced case?
Do you plan to overlock the cpu? If not consider E3-12xxv3 series.
I think that this is his choice because he wrote that he wants a “future-proved” computer so DDR4 is the right choice at this point and for my own computer I bought the 970 because the power difference is only about 12%. I use it to play BF4 (Ultra Settings) and Far Cry 4 (Ultra Settings) and I never had any problems with FPS drops etc.
@DotDash I recommend the Cryorig R1 Ultiamte as CPU cooler and your PSU is probably overpowered you can use a PSU power calculator to calculate the needed power.