IME bi-wiring is always an upgrade. Go for that. It reduces IMD and results in increased clarity. Passive bi-amping, a further upgrade. Same reason basically, but now even more so.
Below image is a friend's super system in Mar '24, passive bi-amping the Audiovectors with 2x prs of TK Ultra EXB7 monos and using AQ Dragon speaker cables (bass and regular sets). Umm, it sounded quite good ;)
And please also be careful that high capacitance cables (as the Kimber are somewhat known for) can cause some amps stability issues (eg classic Naim, ..).
Merry Christmas! TK
https://drive.google.com/file/d/1I-XdPR2dn2aAOwRHOd2QXDz8glK4DlgJ/view?usp=sharing