Price Update:
Case: BitFenix Prodigy [77,33€] (Green, for some reason cheaper than other colors)
Mobo: Gigabyte Z97N-Gaming 5 [137,02€]
CPU: Intel Pentium G3258 AE [57,18€]
CPU Cooler: NZXT Respire T40 [33,79€] (still looking at coolers..)
GPU: Gigabyte Radeon R9 280 WindForce 3GB [196,69€] (out of stock)
PSU: Crosair CX600 (re-use)
RAM: G.Skill Ripjaws X Performance 8GB (2x4) [71,69€] (found Crucial Ballistix Sport VLP (VeryLowProfile i think), could maybe be good to get a good cpu cooler (clearance issue))
SSD: Crucial MX100 126GB [62,01€] (258gb->128gb, have 1tb in other internal storage, so this should be enough)
HDD: WD Black 500GB + Seagate Momentus 500GB (re-use)
Total: 635,71€