Any reason to spend $$ on hi-end ICs for an iPod?

I'm using an Arcam Rdock, with a pair of surprisingly well made but decidedly non-audiophile grade $13 RCA interconnects from Radio Shack, to go to my Arcam Solo. I have 70GB of music on my iPod, from myriad sources, in a wide variety of bitrates, all compressed.

Could a pair of interconnects *really* improve compressed iPod audio that much? I'm a bit skeptical. I can't even say that the amplification provided by the Rdock is all that noticeable in terms of SQ vs the normal iPod dock.

Anyone else have upscale ICs attached to an Rdock? Can you hear the difference?

thanks,