Not at all familiar with Danish prices, but if you just need a PSU for a i5 2500 and GTX560ti then something like this-
XFX 550W http://www.komplett.dk/k/ki.aspx?sku=657685
would be perfectly sufficient.
If there's other stuff on your list that we can't see, or you plan on adding things in later then you can go higher on wattage, but for the time being its unnecessary.
Seasonic PSUs are usually very good quality and all XFX PSUs (as far as I'm aware) are made by Seasonic too.