I'd go with an AMD build, they're more power for less money. Adding the komplett.se links too (LOL YUS I AM TOTALLY SPONSORED BY THEM LOOLOL)
GPU:
ASUS Radeon HD 6950 2GB GDDR5
CPU:
AMD Phenom II X4 975 Black Edition
Motherboard:
Gigabyte GA-990FXA-UD3, Socket-AM3+
Case:
Cooler Master HAF 932 Advanced Big Tower
RAM:
Crucial DDR3 1333MHz 8GB KIT, CL9
Power supply:
Corsair HX 750W PSU
Hard drive disk:
Western Digital CaviarĀ® Blue 1TB
Total cost: 9350 SEK
You might want to buy a CD/DVD drive thingy if you don't have one around. If you want to be cheap, grab it from your old computer.
If it's a bit too expensive, you could downgrade the GPU to like a Radeon HD 6870 and save like 900 kr on that.