I am still using the Yellow-Red-white that kind of cheap cable for all my connection, which usually comes free as an accessory with AV equipment purchase; like DVD player, VCR, Play-Station...etc. They work flawlessly.

Do not ever believe in people claming that certain type of cable will make your system sounds better; it is just plain ridiculous. If you ever see a pair of audio cable sells more than $100 dollars, you know it has a problem.