Not sure but that 260X seems to be comparable to a 650TI in benchmarks on tom's hardware. So that seems a bit low.
Also, even if I don't change anything, it says 799.
Let me make a list for similar things from pricewatch:
Zalman ZM-T4 case: €31,80
Gigabyte GA-Z97-HD3 (same mobo): €92,80
Seagate Desktop HDD, 1TB (same HDD): €48,80
Intel Core i5 4570 Boxed (same): €170,95
Crucial CT102464BA160B (standard 8GB crucial, same): €68,09
LG GH24NS90 Zwart (DVD, Same): €19,70
Microsoft Windows 8.1 EN OEM 64-bit (english is 10 euro extra but okay): €89,80
Total without the video card is €521,94
Add a decent video card: MSI GeForce GTX 760 Gaming €213,95 (260x is €108 btw).
That is €740,-
So you save €60,- and have imo a better PC. And that €60 you could spend on say a better processor or a better video card perhaps. (or pay a PC student at your uni €60 to put it together
)
And since you already know how to build a little bit + all the stuff that you can find online you are a "thief of your own wallet" if you buy the premade one (a Dutch expression
).
Anyways, maybe somebody else can give an opinion on that alternate PC but imo, premade is always going to be much more expensive.