^^ A good choice for a hassle-free set up and no concerns about local codes.
Re: doubled CAT5
Plenum Cat5 is 22 ga., Doubled equiv. Is 19ga., adequate for most home applications
However, in wall, it's better to have fine strands, and higher guage means better power and transparency
I still have kapton covered, silver plated 4ga. Boeing 727 control cable for the short, open run from my tube amp to my speakers.
It is massive overkill and is there for my amusement.
Swapping in doubled 500' ft of CAT5 several times never changed sound or showed any sign of cable temperature (measured) change.
Practically and inside of a closed wall, doubled 14 ga., stranded wire means no headaches.