Post [Q] root or no root(knox 4.2.2) GT-I9506, and what CSC to DeHAWK rom.

Hi, yesterday I received the GT-I9506, and I have seen that if we update to 4.3 and root do we run out of warranty.
So if I root 4.2.2, you could leave the phone factory and if I want to upgrade to 4.3.

I want to install this rom, but i dont know that CSC put, I live in Spain. (Do not know if this influences)

I now have with a 4.2.2 stock(spain vodafone) CSC I9506VFGAMH4