I run a pair of HD600s through an Antique Sound Labs DT OTL Mk III headphone amp (tube). I like what I read about the Equinox, but they are listed as "warmer" than the Cardas. Most reviews I see rate the Equinox higher overall. Would the less "warm" Cardas cable be a better match for a tube amp that will already add a bit of warmth? Prices are comparable, so it just comes down to a matter of better match. I don't mind the waiting period on the Equinox cables (if they are a better choice). Unfortunately buying both and doing an a/b test isn't an option.