Hi Bob: The Kimber SELECT series is excellent, particularly the 21 and 30 series IC. I don't know how long you have had your 1021's, but from my experience 1,000+ hours are needed on these IC's before they settle in --particularly with the KS 10/1130. Some say even three months of playing time! A cable-burner/cooker speeds up this break-in time considerably. A fully "settled" KS-21 or 30 series IC appears to offer everything; tonal richness/realism, transparancy, focus staging etc, you name it, they got it. So long as your equipment is up to par, they'll sound great. The 10/11-11 all copper interconnect is also very good just not up to the ultimate transparancy, staging, bass resolution and life-likeness of the higher series. In no way does the 21 or 30 series sound brighter than the copper --just way more revealing and lifelike, so long as they are fully burned-in/settled. You can't go wrong with any of the SELECT series IC. The 21 and 30 series are simply one of the best I've heard.