And after a family gathering where I got to to talk to my brother and nephew, both hardcore gamers, I decided to go for SSD harddisk instead of a normal one. Stupid me thought things like: 'how big can the difference be?'. Boy, was I wrong 
This added another €200 to my rig though 
Some specs:
GPU + motherboard: Intel Core i7 4790K 4.0 GHz + ASUS Maximus VII Ranger
Video Card: Nvidia GTX 780 3GB
Hard disks: SSD Crucial MX100 512GB + SSD Crucial MX100 256GB
RAM: Crucial Ballistix Tactical 16GB DDR3-1866
Cooler: Cooler Master Hyper 412S
Feed: Corsair RM Series 850W
And new keyboard, mouse, blu ray player, DVD player + burner (I like having 2 slots, there's a DVD burner in the blu ray player as well but meh
), Windows 8 and two 21,5 Inch LG 22M45D Full-HD LED screens. And last but not least: it will be overclocked.
If anyone has any tips feel free to give them
I have a bit extra left to spend if necessary. If you see overkill, please tell me. I noticed when shopping around that most computers these days have 'only' 8 gigs of RAM. The 5 year old machine I'm playing on now already has 8 gigs haha. That might;ve been massive overkill at the time
do note I wish to use this machine for like the next 5 years, so a little overkill for what's released right now is to be expected.