Alright so if I were to get a computer, I would save up about 1500 USD, or in your case, about 1000-1100 euros. I have found a build that would basically play those games, render very quickly, and you can probably run more than 1 screen. Here is the parts list:
Case Corsair Vengeance C70
PSU Rosewhill Hive 750W
Mobo Gigabyte G1.Sniper Z87
CPU Intel Core i5-4670K
Cooler Cooler Master Hyper 212 EVO
GPU EVGA GeForce GTX 760 2GB 02G-P4-3765-KR
RAM 2x 4GB G.SKILL Ares Series F3-1600C9D-8GAO
Optical Drive Samsung SH-224DB/BEBE DVD Burner
SSD Samsung 840 EVO 250GB
HDD Seagate Barracuda 1TB ST1000DM003