Hi. Would also like to suggest a PC set. It is recommended by one of the local PC forum members and a good one. Not an expert myself.
SAPPHIRE HD5670 1GB GDDR5 PCIE16 11168-30-20G (chosen by me because of the prize though not sure if it fits :P) If you are not going for gaming there is no need for expensive card.
Otherwise would recommend Sapphire 6850 which is like 80€ more expensive than 5670.
CORSAIR DDR3-1333 2*4G CL9 KIT XMS3+CHS CMX8GX3M2A1333C9
Intel BLKDH67CLB3 H67 DDR3 1333/ HDMI+DVI-I / 1xPCI-E x16/ 2xPCI-E x1/ 3x PCI/ 5xSATA
Intel Core i5 2310
SEA BARRACUDA 500GB 3.5" SATA3 7.2K 16MB ST500DM002 (basically your free choice)
SeaSonic S12II series 520W 85+ (Bronze) (around 65€) or
CHIEFTEC A-80 PSU 550W 12CM ATX2.3 80+ CTG-550-80P (around 45€) Bronze one is more silent
GIGA-BYTE CASE MIDITOWER ATX W/O PSU/GZ-X2 BLACK GIGABYTE (free choice but it is cheap and not bad either)
Those PSUs have quality and imo the most important part of PC. If it blows your system will blow. Same story for motherboard. Dont save money there. This model is around 80€.
If you havent put a PC together before I would suggest investing something like 20€ so that shop does it for you.
It would be great if you could invest some buck for UPS also in case the power is cut off. Sudden power fluctuations (electricity off/on/off/on etc/storms) could harm your system. So UPS is your safe bet.
About 600€ together
Cheers