The BeoSystem 3 is for the serious home theater or consumer of video content.
-The VisionClear package is far more expansive on the BeoSystem 3 including the Pixelworks chipset. (picture is significantly improved on same screen type)
-Ability to run in Cinema Mode by managing the transition to a projector and turning the soundstage (or managing a second zone for cinema viewing)
-Additional inputs
-DSP for multiple listening positions
-Broader range of supported sound formats
-MUX output for local automation features like triggering shades, lighting scenes, drop screens, etc.
So there's a pretty big difference, but on the other hand you're paying for a lot of features you may not be using. There's only one room in my house, for example, that can get the additional benefits that the BeoSystem 3 offers. The other rooms are fine with BV8s.
There is scarcely anything in this world that some man cannot make a little worse and sell a little more cheaply. The person who buys on price alone is this man's lawful prey. - John Ruskin