http://www.radioshack.com/product/index.js...rentPage=search

I have a Logitech Z-5500 which was ok for movies. I wouldn't use it to listen to music. I replaced the speakers with old floorstanding speakers and that improved the sound by a large amount. I got tired of the sub humming when in standby mode and it started picking up RF interference which drove me nuts, so it had to go.

$160 later and I finally have some decent audio.