well your PSU, ur ram, and mobo seam not bad but the ECS is not a well known company and it not the best but the graphics card i would suggest a radeon 6850 or gtx 560 ti? the processer i5 2500k/i3 2100 will cost you $400+ soo
(Don't buy from Newegg, I only linked them so you can see what parts I'm talking about. Also, I converted USD to Euros, so you can see how many euros it would be.)
With that many Euros you can do pretty good.