This is just one man's opinion, but I don't really recommend getting heavy into cable until the system gets to the point where it warrants spending some actual money beyond Radio Shack (or the like - AR, Monster, etc.) cabling.
You have a nice CD player, and decent speakers. I'd look into upgrading your amplification, then loudspeakers, before thinking about wire.
You have a nice CD player, and decent speakers. I'd look into upgrading your amplification, then loudspeakers, before thinking about wire.