I use a 40GB iPod and Altec Lansing self powered speakers with a sub woofer. It isn't the quality of my main stereo, but it's plenty good for my shop. I placed a block of wood over the sub port to tighten the bass. I paid $100 5 years ago. CompUSA now has them on sale for $49 and a Grand Opening of a CompUSA advertised them for $39 2 weeks ago. My CD changer just gathers dust now.
Dave