Sorry for the delays but between configuring the server, studing for the final exams that I have after the holydays and christmas I've been pretty busy.
So, some pics of the server (sorry for the quality, I should have used the DSLR, but I wa anxious to strat building it, so I used the crappy camera in my nexus):
All the parts in their boxes before starting
Nice case, really good buid quality and pretty small
The motherboard fits without any problem, but I don't understand why the case doesn't come with the standof's preinstalled.
The PSU also fits perfectly. This unit despite being cheap feels heavy (for my at least it denotes quality) and nice.
The HDD trays are good looking and functional.
Some food for my and my brother, he'd never seen an open computer, so I tried to teach him something.
I tried to organize the cables, it doesn't look too organized, but they are and the air-flow path is clear from cables.
The finished computer is quite silent and runs really cool. It has an idle temperature of 31ºC and a loaded one that remains between 43 and 44ºC with the CPU cooler fan at 2000rpm (Intel stock).
I'm really happy with the build and with Windows Server 2012 R2, it's a really nice and useful OS. I think that I'm gonna use it in future projects, I really liked it. In fact today I ordered an 8GB RAM stick to setup some VM and practice with it.
Thank you all for your help.