Both HDD and SSD are IMO too small.
For HDD, the 1TB is inefficient: €51 for 1TB, €98 for 3TB — that is more than 50% difference in cost/TB (both for WD blue desktop series as listed on computeruniverse.net).
For the SSD, the 256 GB is just too small. Sure that’s enough to boot Windows, but not enough to fit more than a couple of modern games, they easily take 50GB/each. I’d rather recommend 480GB these days.
Regarding the SSD, for Windows a 120GB or even a 60GB SSD would be enough (but those are also slower). 250GB is already a lot of additional space for games – again, it depends on the usage. A couple of games is what is the usual way of thinking for what a SSD should be used, and for that 250GB is just right. But if one wants multiple modern AAA games on it at the same time 480GB sure is more useful.
I'm not a fan of their brackets and they also seem to favor nvidia over amd, but it's serves the purpose of, without actually having to put a machine together in pcpartpicker [0], seeing what can be done at a price point with current pieces.
Too bad about the language barrier, but I'm guessing more languages (such as spanish or english) are in the roadmap somewhere.
Intel just released the Kaby Lake processors which are tiny bit faster (because they are clocked higher), currently integrating this. But does not change much.