Sorry, won't click on a link that just says here from my phone. Can't scroll over it to see the destination, should just post the full link like pcpartpicker.com/ etc.
It is a link to mindfactory.de, which is the biggest/cheapest german hardware seller. I already tried putting this list together on pcpartpicker, but unfortunately it doesn't pick all the products from their site correctly and so it does not include the best offers.
As the Gtx 1080 in higher specced systems doesn't even reach constant 60+fps in some games on MAX settings at 1440p, I already know this won't work. It's a great build, but you will have to put some settings down in certain games.
Thanks for the answer! Makes sense, it seems there are some really resource intensive settings on certain games. But I'm already satisfied if got the most out of my budget and that you didn't find any obvious errors.