I'm going to buy a PC so I need some help with that

Maybe post brands and types in text too in case some are too lazy to click all 6 links. ;)

Looks like a decent build, though I am a fan of NVIDIA over AMD cards. :) I don't know how good AMD cards are these days, so it's just personal preference. Your PSU should be more than sufficient. This is a great "gaming only" rig. Or for which gaming will be the primary use.

I recently upgraded myself (just waiting for the stuff to arrive) and due to my Photoshop use and other things, and the great deal I got, I went with an i7 and 32gb of RAM. Way overkill for just gaming tho.

try to save a little bit more money and get i-7 4790k its Best processor for gaming and try to get Nvidia 980 or 980TI for better gaming performance... A little bit more saving can get u High Gaming pc and much for faster then your currently shown config

Why don't you wait until you can buy all the parts at once? There is a chance that those parts you buy now will get cheaper when you buy your gpu and you won't have a satisfying gaming experience on this without a gpu. 6th generation of Intel i series is coming out in like a month or two, it will support DDR4 and DDR3 (the L version) so it will be a better "future proof" buy, unless they are a lot more expensive than haswell.

I'd wait for Intel Skylake release next month. Even if you choose to not go with it, older stuff will be cheaper, esp. used.

128GB SSD is small. It go 250GB, since games tend to be massive.

I wouldn't advise any Core i5 under 4690, or maybe 4790. You will feel that 15-20% difference.

I wouldn't spend any money until you have enough for every part you need. Who knows, by the time you are actually ready to build your machine your motherboard or some other part could have dropped in price significantly.

Your build is very good but for gpu I would recommend a 290x because 390 is basically a 290 rebrand with 8gb vram.

Looks great, how much do you pay for the ssd?

I'd remove the ssd and bump the powersupply a lil bit, the 390 can be quite a power hungry beach :3
unless you plan to switch the powersupply later as well.

I'd switch the ssd with a mechanical drive, I have a 250gb one (as you know) and a few games are enough to fill it (right now titanfall alone takes 65 gb).

Go for it, the intel 4600 is quite nice, let's you play quite a lot of stuff if you're willing to turn details down :)

get nvidea

Why do you need SSD?

More RAM my friend, at least one more of 4GB

I would get 16gigs of ram the price is so cheap now and you will thanks yourself later imo better to have to much then not enough as i play GTA V with 8gigs it does not leave much left .

That GPU alone will eat about 208 watts give or take depending on load,i would maybe step it up a bit,as power supplies over time degrade from use,this way you know you will have enough later down the road even while it degrades. 700-750 watt.You never get the get the full rated watts due to some power loss and depending on if you hook it up to 120 or 220 and how efficient it is as to what you will get for true power.

That GPU is nice but may be a bit over kill unless your going to do say 4K or multi monitor,but then again it is always nice to have extra as you never know,a year form now you might decide to go dual monitor.Also if you want to play say GTA V to max it out you will need at least 4gb Vram,so really this also depends how you want to run games and at what resolution as to how much vram.And i say if you can afford it why not,you may never use the extra Vram but you will have it just in case.

Bottom line when it comes to future proof it is hard to say,that why i always say get the best you can afford now that will give you the best shot of lasting the longest.

It's good, awesome; enjoy it! For what I can find, it's a "gold" PSU, it should e enough.

PS: For HDD, I'd rather buy a caviar black (sshd).

lawl for random HDD and unnamed SSD
I'd get a 7200rpm HDD and a 400-500 MB/s SSD

That board seems like overpriced "gamerrrr" trash, typical ASUS. I'd opt for a bigger SSD and more memory if you're going to keep this hardware for more than two years. Also, wait on DX12 GPUs and hope your board is still compatible then, they might pull some shit moves, never know.

How much will you pay on all those pieces?

Generally there's nothing wrong with your selection. I personally would take a 500 Bequiet PSU as that's more than sufficient to power a R9 390 and CPU etc. Just don't feel you need more than 600W because people keep saying you need MORE POWER! If there's not much price difference between a 128 and 250GB SSD get the bigger one as games eat up a lot of space.
Edit: No CPU cooler? The stock ones bundled with CPUs can be annoyingly loud.

I should recommend you a 256 SSDD, so you can have installed your OS and programs. Also if you can buy a 8gb stick, and later on you could buy a second 8gb stick and have them working better (they should be of the same speed though).

I suppose you already know it, but check Logical Increments