How can I improve this build?

I had a PS4, but am planning on building a PC. This is what I was thinking:

PSU: Corsair RM 650
GPU: ASUS GeForce GTX 970
SSD: SAMSUNG 850 PRO MZ-7KE256BW 2.5" 256GB
MoBo: ASUS Maximus VII Formula LGA 1150 ATX Intel Motherboard
RAM: Corsair Vengeance 8GB DDR3-2133 (PC3-17000) CL11 (2x4gb)
CPU: Intel Core i5-4690K 3.5GHz LGA 1150
HDD: WD Desktop Mainstream 2TB Intellipower SATA III 6.0Gb/s 3.5"
Case: Corsair 760T (BLACK)
Cooler: Corsair Hydro Series™ H100i GTX

What do you think I should change/add? (Not including any peripherals)

dont get the Asus Formula, get the Asus Sabertooth mark 1, they are way more reliable. Also get a Seagate sshd instead of the dinosaur WD. If your budget allows it somehow(maybe by ditching the ssd as you now have a sshd) get a 980 to avoid the 970 crippled memory
or you could skip the overclocking altogether and get i7 hyperthreading on a xeon for a much cheaper maybe even better build

Looks very good to me.

If money is no object, this is good.

You could go down to a MSI Gaming 5, and add an extra 8gb of RAM.

Reliable in what sense?

My question would be, what's your budget? Cause that would help us a lot

$1500 ~, but I have a lot of connections for computer parts. Money won't be a problem, I'm just finding out if any parts are better for the same (or close) price range.

I'm essentially getting every part for around 20% off...

sabertooth and formula have the same features but saber has thermal armor and 2 fans, wont overheat if you overclock.
for your budget then
if you can afford it do this for the ddr4
if not, this

True, but the Formula is easier to overclock in my opinion.

If you plan on using the pc just for gaming, i'd go with the Z97. If you'll be doing video editing or the likes, go for the X99. I'd ditch the AIO cooler for a air one, save you a bit of money.You might not get as good of an OC, but should still be enough. Would wait for the benchmarks of the Fury X to come out and then make a decision of getting either that or a 980ti.

MoBos are MoBos. I just need a durable one that links the parts together and has good and expansive bios.

I would go with 16GB of RAM. Otherwise, I think you'll be happy with that system. You'll probably be looking at a video card in or around 2 years time.

Assuming gaming is the priority.
Vanillla i5 (4460) + midrange h97 board is all you need for modern gaming - high clock speeds makes very little fps difference (overclocking).
Then spend up big on the gpu.
Rest is nice.