So you can spend about $1000 to $1200 us currency. You should be able to get
CPU: core 2 duo e 6300
Mobo: skt lga775 ds3
Ram: 2 1gb of ddr2 667mhz
HDD: 250gig sata2 or 320gig
Case: centrion 5
1 cdrw (reading)
1 dvd burner (burning)
400W power supply
I am assuming you dont do much playing video games, so maybe a 6600, or even a 7600gt.
EDIT: hhhmmm, what I have converted is that your lowest is about 994 dollars american. Is there a differnce between what you use, and German Mark???