Both are solid cables at the end of the day, they're not going to make or break your system. It's not a component, it's wire -- the cherry on top of a really synergistic system.
The only real way to answer your question is to get hold of both and try them in your system, single wired and bi-wired, because bi-wiring doesn't necessarily sound better and in some cases, no different at all than single wiring.
The Cable Company has a huge lending library of wire -- you might try them for a loan on the Kimber. Audio Art has a money-back guarantee.
I've used many cables from both companies and currently have Audio Art SC5 in my system. I've also tried Kimber 4PR, 8PR and 4TC. If I listen REALLY hard...I'd say the Kimber wire in general is slightly 'faster' sounding than the SC5 but again, it's wire, we're talking very slight differences. Without knowing the rest of your system, it's hard to say whether that particular quality would be desirable.
The only real way to answer your question is to get hold of both and try them in your system, single wired and bi-wired, because bi-wiring doesn't necessarily sound better and in some cases, no different at all than single wiring.
The Cable Company has a huge lending library of wire -- you might try them for a loan on the Kimber. Audio Art has a money-back guarantee.
I've used many cables from both companies and currently have Audio Art SC5 in my system. I've also tried Kimber 4PR, 8PR and 4TC. If I listen REALLY hard...I'd say the Kimber wire in general is slightly 'faster' sounding than the SC5 but again, it's wire, we're talking very slight differences. Without knowing the rest of your system, it's hard to say whether that particular quality would be desirable.