Marco,
As Syntax says, a ZYX cartridge is an excellent match with a Triplanar, PROVIDED the cartridge includes ZYX's optional silver headshell weight. If it doesn't, bass response and macro-dynamics will suffer, because a bare 5g ZYX cartridge is lighter than optimal for a tonearm with an effective mass of only 11g.
The Phantom's effective mass is similar to the TriPlanar's, so the same caveat would apply.
You could address this by adding weight to the headshell. ZYX offers one and so do others, though this may have unknown effects on resonance behavior.