Hi there fellow Belgian
I built my own gaming pc last year with the help of a friend, and the friendly folks here at mmo-champion.
Some other Belgian user here, Sergov, gave me the advice to order my parts in the Netherlands, where they are cheaper. I ordered mine at afuture.nl, and did not have any problems with ordering or delivery. Maybe it's worth checking out for you.
I ordered my GPU at alternate.be though, because afuture.nl didn't offer the 'free' game that came with my Nvidia card.
And I got my monitor at coolblue.be, because hooray for free delivery the next day.
My build is similar to the one you are planning to get. I have the same SSD, but on top of that I have a WD Black 1TB for my games and software (cause it's fast), and a WD Blue 2TB for movie/anime/series/files storage.
Btw, don't forget to update your opening post if you make any changes to the build.
Good luck and enjoy