Upgrade or replace my current gaming rig for 1440p (possibly ultrawide) high end FPS?

[Highmodulus]

Hello my gurus of gaming machines, I could use some objective advice. I built a power gaming machine back in January of 2015 based on the advice of this forum, mostly for ultra eye candy 1080p gaming on FPS and also Civ 5.

Now I am gaming at 1440p and looking to upgrade my primary monitor to do at least 120hz refresh rates (and hopefully 144hz), possibly ultrawide if those darn LGs ever come back in stock again. Would like to be able to run the settings high to ultra for the new FPS coming out and for CIV 6 turn speeds. I did a mid-term video card refresh, but otherwise the build is stock and over 4 years old. Fan on the tower cool is slow to start up (which trips the BIOS, annoying), but I have a Noctura fan to replace it (avoiding it for now).

Chip and Memory are o/c using the suggested set-up in the ASUS BIOS software. 1080 is factory o/c.

At first I thought I had to do an entirely new build, but after reading the last 10 pages I am starting to wonder if a set of upgrades is a better option value wise, budget isn't a huge issue but value and quality are:

Intel Core i7-4790K Haswell Quad-Core 4.0GHz LGA /
ASUS MAXIMUS VII HERO LGA 1150 Intel Z97 /
G G.SKILL Trident X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) /
MSI GTX 1080 8 Gig Factory O/C
Cooler Master Hyper 212 EVO - CPU Cooler /
Samsung 850 EVO 1TB 2.5-Inch SATA III Internal SSD /
EVGA SuperNOVA 850G2 80PLUS Gold Certified ATX12V/EPS12V 850W Power Supply /
Thermaltake Core V51 Computer Case/
Asus 24x DVD-RW Serial-ATA

Suggestions/Ideas/Advice?

 

[Flayed]

If budget isn't much of an issue you could replace the motherboard, ram and CPU with a 9900k, a high-end z390 board and ddr4 brand of choice. Going by your current rig an Asus Maximus XI HERO and G Skill Trident Z 3200 Mhz DDR4.

 

[Shmee]

Your build is actually pretty decent, though for high FPS @1440p I would say get a better video card, 2080Ti if budget permits. You could then OC your CPU, which is already pretty fast.