Cardas "golden-ratio" are big/huge film caps, supposedly have teflon-composite dielectric (my guess is one layer of teflon with one layer of something else, that something else is for ensuring the tight tension since teflon likes to stretch). The sound is detailed and rich and super warm with very rounded bass. It can sound too juicy and bass heavy depends on where you are using it, but that can be a good thing for the rather flat iPod 5G. For a desktop CDP I will pick Mundorf SIO first, but to add flavor to the iPod video, the Cardas might be a better choice.
and like the Mundorf, the Cardas is huge and super expensive, cost even more than the SIO