i am looking at buying groneberg ts premium ic.s i know they are very popular in europe has anyone on this forum auditioned these cables? i own the quattro reference cables and like them very much but i am getting the upgrade bug. i just bought a high end symphonic line vibrato cd player and musical fidelity x-10v3 tube buffer and i listen mainly to redbook cd,s and feel i would benefit from higher end cables and i welcome any opinions or advice.