Paragon Radiant speakers (5 inch "mtm" w/Dynaudio drivers), or Magneplanar MMG's in a smaller room. I have not had a Levinson amp in my home, but can't imagine that this MIT interconnect would not get the best out of it (mine is a 2 meter run, and it IS likely that a much longer run would not sound as good...nobody ever gets to do an endrun around insertion losses, no matter what bs they sling). But then, you can't know ahead of time, before you try, so get started. Rent cables from friends, or The Cable Company..............Of interest, Kimber Bi-Focal is not a silver cable, it is all copper. The only silver Kimber speaker cables that I'm aware of, are 4AG, 8AG, KS 3035, KS 3038, and 88. Also, I have Purist Audio Colossus power cords; but as good as they are, I preferred the Synergistic Reference Coupler power cord, to all others I've tried with my Krell (including FIM and Shunyata). I'm holding out for a used one of sufficient length.......Also, I can't imagine why you would prefer using the Levinson linestage with the CD55 (instead of driving the amp direct with it), unless it is just really wimpy compared to the CD50 that I have. When driving either of my amps directly, mine has the dynamics of life, even of an "avalanche"!! Also reminds me very much of analog. It beats everything I've heard by a mile, systems costing many times what mine costs. It need only be left on a week or two, and then look out! It's astoundingly good. Perhaps you could sell your CD55 and 380S, buy a CD50, and spend the savings on some "real" cables, IMO.