Help With PC Upgrade

[Yoro]

I built my current PC in October of 2016 and have since made minor upgrades (RAM, more storage, AIO Cooler). I am now looking into doing some more upgrades to keep my build up to date.

My current build is:

CPU: Intel i7 6700k

GPU: EVGA GTX 1080 FTW

Motherboard: ASUS ATX Pro Gaming H170

CPU Cooler: NZXT KRAKEN X61

Memory: 2x8GB HyperX DDR4 @ 2133Mhz

Storage: 125 GB Samsung M.2 Boot Drive, 1TB Samsung 960 SSD, 2TB WD HDD

Case: NZXT S340 (White)

PSU: EVGA 600W Bronze

 

Currently I think my GPU is good for another year or so, but I am looking for help with a new CPU or motherboard. All suggestions are greatly appreciated. Thank you.

 

PS: I am trying to go for a clean white/blue color scheme for parts.