Reddit mentions of Intel Boxed Core I5-6600 FC-LGA14C 3.30 Ghz 6 M Processor Cache 4 LGA 1151 BX80662I56600

With your budget, you could go to skylake.

You do not need such a good cpu cooler for a locked i5. Even the stock cooler should be cool and quiet enough.

16 GB Ram is more than needed for those games.

The psu is oversized and too expensive for your needs. It is okay if you want to later upgrade to another gpu, but even then there are cheaper options that are good enough. For this build, you do not need more than 400W.

104€ is a strange price for a normal SSD, as it is too expensive for 250GB but not expensive enough for 512. Which model is that?

This would be my suggestion:

pc-kombo recommendation

Type|Item|Price

----|:----|:----
CPU | Intel Core i5-6600 | EUR 235,10 @ Amazon.de
Motherboard | MSI B150M Bazzoka | EUR 79,90 @ Cyberport
Memory | Corsair Vengeance LPX 8GB (8 GB) | EUR 51,38 @ Amazon.de
SSD | Samsung MZ-75E250B/EU (256 GB) | EUR 80,00 @ Amazon.de
Case | Cooler Master N300 | EUR 47,00 @ Amazon.de
Power Supply | Be quiet! L8-CM (430 W) | EUR 61,80 @ Amazon.de
| Total | €555.18
| Generated by pc-kombo 27.01.2016 |

The case is of course a subjective pick, and you could also go with the Corsair.

He actually makes a lot of good points!

I revised the build a little, try this

PCPartPicker part list / Price breakdown by merchant

Type|Item|Price

----|:----|:----
CPU | Intel Core i5-4590 3.3GHz Quad-Core Processor | €201.90 @ Caseking
Motherboard | ASRock H97 Anniversary ATX LGA1150 Motherboard | €75.00
Memory | Kingston HyperX Fury Red 8GB (2 x 4GB) DDR3-1866 Memory | €47.77 @ Amazon Deutschland
Storage | Crucial BX100 250GB 2.5" Solid State Drive | €82.89 @ Amazon Deutschland
Storage | Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive | €51.45 @ Amazon Deutschland
Video Card | PowerColor Radeon R9 390 8GB PCS+ Video Card | €333.94 @ Amazon Deutschland
Case | Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case | €88.58 @ Amazon Deutschland
Power Supply | XFX 550W 80+ Bronze Certified ATX Power Supply | €68.61 @ Amazon Deutschland
Case Fan | Corsair Air Series SP120 Quiet Edition (2-Pack) 37.9 CFM 120mm Fans | €32.90 @ Caseking
| Prices include shipping, taxes, rebates, and discounts |
| Total | €983.04
| Generated by PCPartPicker 2015-12-26 16:56 CET+0100 |

Personally I think Skylake + DDR4 is not that much of an upgrade, especially because it doesnt really futureproof your computer or somehow give any benefit over Haswell.
The CPU linked in the build below is not the actual one you would/should be getting, but instead a downclocked, low-voltage version with not nearly as much power as the i5-4590/4690 or the i5-6600 (Although the price difference is not that big, 10$ http://www.amazon.de/Intel-Skylake-5-6600-Herzen-BX80662I56600/dp/B010T6D39O/ref=pd_sim_sbs_147_2?ie=UTF8&dpID=518KNd4nD%2BL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1NCRQ0G15THJ2XS9AKTA)

Overall I think his build is pretty good, seeing as airflow and a good case seem immportant to you I would like to at least recommend swapping in the Fractal Design case incase you should go with this build. It is fantastic, a breeze to build in, quiet, clean, cool.

If you have anymore questions feel free to ask

EDIT:
Sry had the wrong PCPP in there, fixed now!

When i received my Motherboard i had to install few MSI softwares , and you can activate a "gaming mode" that boost the CPU to 3.9 / 3.8ghz , it's pretty good. ( It also automatically manage the fan RPM )

If you want to buy a good cpu , this one is very good :

You can see the benchmark Here

And buy it here

)

EDIT 31/01/2016 19:53 : I've seen that the cpu is a little bit expensive on amazon , i bought it 240€ and it cost 438$ so i think that if you search you can find it cheaper :)

I couldn't find it on PC part picker so I just went with the closest alternative, it's not the k version it's this one:

https://www.amazon.co.uk/gp/aw/d/B010T6D39O/ref=mp_s_a_1_1?ie=UTF8&qid=1474728886&sr=8-1&pi=SY200_QL40&keywords=i5+6600+turbo&dpPl=1&dpID=518KNd4nD%2BL&ref=plSrch

UK prices. http://www.amazon.co.uk/Intel-Cache-Processor-i5-6600-Turbo/dp/B010T6D39O

Cheers, what do you think of replacing the graphics card and processor you've listed with these?

Graphics card

CPU