Default [Q] Samsung SIII 4G GT-I9305 Rooting (4.3)

I was searching around to find out how to root my device but was unable to find any relevant to the latest software update (4.3) and I'm trying not to brick it considering I'm still paying it off ( two year commitment )

My device is a. S3 4G GT-I9305 with 4.3 installed (Australian)

I've looked at other threads but they're around the date 2012, which is too outdated for my needs.
Any help appreciated.

Thank you.