Do not expect the sound to be changed a lot.
High level cables have a large diameter so they look like high level i.e. to be different from generic speaker wires but in reality offer almost the same performance.
High level cables won't mean it's the right cables so whether you will experiment with higher or lower price it doesn't realy matter.
Wage the cable upgrade prices v.s. matching power amp to bi-amplify your system that may bring much more changes.
High level cables have a large diameter so they look like high level i.e. to be different from generic speaker wires but in reality offer almost the same performance.
High level cables won't mean it's the right cables so whether you will experiment with higher or lower price it doesn't realy matter.
Wage the cable upgrade prices v.s. matching power amp to bi-amplify your system that may bring much more changes.