If you have an extra speaker or two and some wire laying around you can turn your existing stereo into a matrixed surround system for zero cost. Do a search on Halfler surround for the details. Basically you wire the rear speakers in series and strap them across the positive terminals of your (solid state) stereo amp. The rear speakers will then only reproduce the difference signal. Similar to Dolby matrix surround and is in some ways superior for music (no steering logic applied). I used to do this and it worded quite well.