Hm think I can find a monitor for around 130 euro. And for windows.. they sell w7 OEM for 90..
About pc.. (prices are from one shop I visit)
Memory:
Corsair Vengeance DDR3,1600-8GB KIT  - For €45, 99 
Processor:
Intel Core i5-2550K, s1155 3,4 ghz for €204, 98 
Intel Core i5-2500K, s1155 3,3 ghz for €196, 98 
(much difference?)
GPU:
Sapphire Radeon HD7850,2GB for €212, 98 
Other options: 
EVGA GeForce GTX560 Ti,2GB
Sapphire Radeon HD6870,1GB for €151, 98 (budget option) 
Motherboard.. not sure yet, is this good?:
Asus P8H77-V LE,s1155 for €93,99Give some other options please.
Some questions I have:
- What power to choose? Is 
this good? Or too much/not enough?
- Need processor cooler? Or does it already have one included?