I've been catching up on aftermarket cable reviews posted on this board, and it seems not all of them have a favorable sonic profile (not to mention the microphonics from the helix-type cables).
The Westones are the only ones I've actually had a chance to try, and the treble was enhanced every so slightly in a way that I didn't need.
Still, I feel like I'm being left out by only going after the stock cables.
On the fence about what to get now...
Look into the FiiO RC-UE1.