That's going to really limit your build, especially since I don't see a case, data drives, or removable drive units included in that. But I see 2 major problems with this:
1. The Athlon chips require a separate GPU, which I don't see listed. If you don't already have one, you either need to increase your budget by another 100-200 euros, or you need to get a chip with integrated graphics. The AMD A8/A10s are equivalent to your Athlons, & have integrated graphics on them.
2. Your budget is also going to limit the type of board you can buy. The better the A-series CPU you pick, the more likely you are to have to settle for a mATX board. Nothing against them, but unless your cases limits you to a mATX board you're going to find yourself limited on future upgrades -- usually they only have 2 RAM slots, have maybe 1 or 2 x16 PCI slots (which generally means no chance of SLI/CrossFireX), have fewer SATA slots, & a lot fewer x1 PCIe slots for expansion.
As for going with an Intel build on this budget...not only would you be extremely limited (i.e. only being able to pick mATX boards if using a Haswell i3), you would be completely over budget with Skylake (cheapest Skylake i3 & mATX board came in at just under 200 euros).
So, if there's any way you can stretch your budget a bit more, you may want to consider that.