Well then.. for Graphics cards we've got the following:
MSI GeForce GTX 1080Ti Gaming X
ASUS ROG STRIX GTX 1080Ti OC
EVGA GeForce GTX 1080Ti FTW3
For monitors we have currently only 2 real options available, no UW 1440p 144Hz exists yet till Q4 of this year.
It's the same principle but locked to 100Hz refresh rate instead:
Acer Predator X34A - IPS - 3440x1440@100Hz G-Sync
ASUS ROG Swift PG348Q - IPS - 3440x1440@100Hz G-Sync
The monitors you
SPECIFICALLY want will come out end of this year and are the following:
Acer Predator X35 and the ASUS ROG Swift PG35VQ
Note that the previously 2 linked 100Hz monitors do not have HDR and the 2 new monitors at the end of the year will have HDR.
The difference will be that they will be even more expensive than the ones currently available.
Pick your poison, and yes I linked Tweakers.net with shop choices because I know most of those ship to Belgium as well and are cheaper than in Belgium itself.
And you could potentially just do a pick-up run during a saturday or something, not like Belgium is far away.