One generally wants to make a balanced build whereby each component fits the desired tasks. If this is to be a combo work station / gaming box, the 770k is an appropriate choice .... but then pairing it with a super low budget cooler is a contradiction. BTW, any reason you used german vendors and to US dollars ?
1. If this is a gaming box, and budget is an issue, Id select the 7600k ... hyperthreading doesn't do much at all for a gaming box if you are overclocking.
2. The 7600k w/ a better cooler will bring more to the table in gaming. This one competes matches the performance of coolers costing 203 times its price
https://de.pcpartpicker.com/product/8YrcCJ/scythe-cpu-cooler-scmgd1000
3. As for the MoBo ... if ya like the LED thing, go fpor it ... but there are significantly cheaper boards with the same features in this price range. We have been going more with Gigabyte and MSI boards of late
4. i think you will find thet DDR4-3200 comes at a very minor bump in price.
5. The SSHD choice was smart... a 250 GB SSD won't do squat for most of a 500 GB gaming library. But you could add an SSD on top of that given what ya saved with the 7600k. Here ya see the SSHD outperforming a WD Black by 50+% in gaming ... more than twice as fast as the Blue
http://www.tomshardware.com/charts/hdd-charts-2013/-17-PCMark-7-Gaming,2915.html
And same 5 year warranty and lower RMA rate than the Black
6. Before picking a GFX card, this question must be asked ... what resolution and refresh rate is the monitor. if Iits 1080p, than a 1080 is extreme overkill. A 1070 is more than enough and is well suited for 1440p
Whatever ya pick start here and type in the GFX card in the filter window... read the reviews starting with th 9.9 and work ya way down
https://www.techpowerup.com/reviews/
7. Lose the low budget PSU, if budget an issue, Unfortunately, most of my typical favs are not available in germany
https://de.pcpartpicker.com/product/nB3RsY/seasonic-power-supply-s12ii620bronze