Well, I've never been a huge believer in aftermarket cables; I buy them mainly for looks and ergonomic improvements (I like thicker cables without memory wires). However, having had access to a wide range of cables, I have come to the conclusion that... in a way, they do tweak the sound, albeit not in a grand, all-encompassing way. In this regard, the best cable I've heard, to date, is Effect Audio's Leonidas II. It's expensive, yeah, and that's probably why I can't convince myself to drop $900 on them. However, they sound really good with the Solaris, improving the sound in a few facets; bass presence and texture is improved, for example. If I had the money to spend (i.e. if my wife approves), I'd get the Leonidas II. It's a superb cable, in every sense of the word.