Want to upgrade my computer for this game, need some advice.

[CGMidlander]

I dunno. While expensive the build is pretty solid. Gotta appreciate that Quad Channel DDR4 and I bet FFXIV would be smooth as butter running 120 FPS on the TV

Quad channel only sounds good on paper. In practice, it offers no real tangible benefits for gaming over dual channel.
Believe it or not, there is no difference between single channel and dual channel memory in most scenarios either.
http://www.hardwaresecrets.com/does-...g-performance/
http://www.gamersnexus.net/guides/13...channel/Page-3

DDR4's benefits over DDR3 atm are dubious too. (Especially when price is considered)
http://www.anandtech.com/show/8959/d...-and-crucial/8

[Judge_Xero]

Quad channel only sounds good on paper. In practice, it offers no real tangible benefits for gaming over dual channel.
Believe it or not, there is no difference between single channel and dual channel memory in most scenarios either.
http://www.hardwaresecrets.com/does-...g-performance/
http://www.gamersnexus.net/guides/13...channel/Page-3

DDR4's benefits over DDR3 atm are dubious too. (Especially when price is considered)
http://www.anandtech.com/show/8959/d...-and-crucial/8

Haha yeah, that's why I used the word "Appreciate" as more from a hardware enthusiast perspective.

For streaming and other programs where the cores will be used yes, but your every day gamer would never utilize the extra cores, a better choice would be either 4790k or 6700k which performs better in games.

Definitely, due to both the 4790k and 6700k both having much stronger per-core performance.