Foreword: You didn't really ask for any specific advice, so I just spoke my mind as long as much as I could.
If you would be willing to drop the Intel part, I can help you.
I can understand why people would want Intel, I personally would love it for emulation, but my X4 860K was, together with a mobo, CHEAPER than an Intel motherboard.
I build my PC for CZK 13600 (just about 500 €). My build:
X4 860K Black Edition
GTX 950 2GD5
ASUS A88XM-A
8GB Kingston RAM (2 more memory slots for 2 more sticks in the future)
520W Corsair PSU
1TB Seagate HDD 7200
Now this may seem like a very low-end build, and it is. I currently use it for catching up with gaming, my only monitor is 1080p, so I don't really need all the horsepower of, say, a Titan X. This said, your experience may vary. My budget was also really constrictive.
My thinking is that the miniITX build format kind of cuts your wings. I'd suggest a mATX, just because SLI support. On the other hand, you can stuff an mITX board into most cases no problem.
For RAM, I personally am a proponent of the cheapest possible. My Kingstons have no heatspreaders and because my case has good airflow, I don't worry about it.
I like the SSD, but I think that's the first upgrade option. Although they are silent, the price/GB is not really great. Get a nice HDD, 1TB or more, down the line. My games boot quickly even from that, keep the SSD for the OS.
The corner-cutting I'm doing right now is purely optional, you don't have to take any piece of advice I give you, it's just my thinking.
PSU: Nice and quiet (be quiet), but still, 400W might give you trouble if you want to upgrade to a more hungry card down the line (who knows what will happen with Pascal and later).
I don't see a CPU cooler in your build plan. Since you're Austrian, Noctuas may be a little cheaper where you live. But if that doesn't fit your plans, any larger CPU cooler will do. I have a Fera2 from SilentiumPC, and it made my PC much much better. I can sleep next to it, now!
So yeah, to sum up: AMD is cheaper, could free up your budget, bigger PSU == bigger upgradability down the line.
Viel Glück mit dem Bauen!