Here is one good system for about 1250-1300€ (maybe less in your country) that will last for 5+ years for hardcore gaming:
- Intel Core i7 6700
- Cryorig H7
or Coolermaster Hyper 212 EVO
- Gigabyte GA-H170-D3HP
or Asrock Z170 Pro4
- 16GB (2x8) G.Skill Ripjaws V DDR4 2666 MHz
- Sapphire Nitro R9 390
or XFX R9 390 (depending which is cheaper)
- Toshiba P300 2TB HDD
- Zalman R1 case
or Deepcool Dukase V2
- Samsung SH-224DB/FB/GB DVD/RW
- Enermax Maxpro 700W EMP700AGT
or Lepa MaxBron B700-MB if you want semi-modular PSU
- Philips 237E7QDSB/00
or Asus VX239H
or AOC I2381FH (Philips is the only one who has all three VGA, DVI and HDMI ports)
I would recommend G.Skill over Corsair/Crucial, because it uses faster and better quality Samsung memory chips, while Corsair and Crucial (Micron) use slightly inferior Micron memory chips. Be quiet PC cases are very good but pricey, Corsair cases are good (and ugly
) but quite pricey, while certain Zalman and Deepcool models offer very good value for the money. There will not be some big difference between the silent case and "ordinary" case, since you'll still going to hear fans spinning.
I would absolutely recommend Sapphire Nitro R9 390 with back plate since it's relatively silent even under full load and temperatures will never exceed 79°C - that is in very hot environment (30°C) with Furmark benchmark; during hardcore gaming in very hot environment it might reach 76-77°C. Currently they are slightly cheaper than RX480 with the same amount of VRAM, while offering practically the same performance.
Currently 23" FHD IPS monitors are offering the best value for the money - they are not expensive and are large enough to enable comfortable view.