[Q] stock 4.3 knox root help topic

Im running a completely stock sprint gs3, it has 4.3 with knox. I want to root so I can then install a new rom. Probably cyanogen mod...but I'm open to suggestions. I know there can be issues with rooting when knox is on the phone. I have searched and found too many conflicting answers and bricking my phone isnt an option. Any help and guidance would be appreciated.

Thanks in advance