replace Cardas 300B Micro with what?

I borrowed a Cardas 300B Micro IC from a friend and I like it but would like something more refined and detailed. Should I just buy a more expensive Cardas cable? If so which one?

Also has anyone tried Innersound IC's? Does anyone know how they sound compare to the Cardas? I remember a thread where the person liked them.

thanks in advance to everyone,
Phil