I'm going to build gaming PC for 2000€. What do you think about these parts? Are there missing something
Intel i7 4770K
ASUS sabertooth
Noctua NH-U12S
EVGA NVIDIA GeForce GTX 780 Classified ACX 3GB GDDR5, 2xDVI/HDMI/DP, PCI-E 3.0
Corsair VENGEANCE PRO BLK 16GB (2KIT) DDR3 1600MHz
Samsung 840 EVO Series 250GB SSD
Western Digital 2TB Caviar Green, 3.5"
Seasonic 750W X-750 SEMI MODULAR
Fractal Design Define XL R2 CASE
Well the build looks good but you could cheap out on some parts basicly.
An i7-4770K is a good cpu for productivity but for gaming there is not much of a diffrence between that and the i5-4670K. The powersupply is overkill basicly a 650W is more then enough for a single gpu setup. also the motherboard, the sabertooth is offcourse a great board, but in my opinnion its a bit expensive for the feutures it has to offer, the Asus Maximus VI Hero, is also a very nice board. and its alot cheaper. the money you would saving on the board and the psu, you could trow that in a better cpu cooler for example. or an GTX780Ti
The cpu is a bit of a choice, the i5-4670K would be totaly fine for gaming, but if you like to do some productivity or video editing as well, then grab the i7.
You could also go cheaper and go the AMD route FX8350 is still a great cpu for gaming. its alot cheaper then the intel option.
here is what i suggest to you
intel i7 4770k
asus ws mobo/msi gaming mobo
noctua nh d14/swiftech h220
asus gtx 780
kingston hyperx predator 8gb 1866 mhz(go with 16 gb if you are planning on doing productivity)
ocz vertex 450 256 gb/kingsotn hyperx 3k 256 bg
hitachi ultrastar 2tb
full modular psu
fractal r4(unless you need an xl atx case)
and add some fan