OK, SB3 is now the classic SB2 is an older model, probably discontinued (though it would still work fine) Squeezebox can do as many streams as your computer can handle. On an older server or the vortex box this means 4 streams (different tunes playing simultaneously in different rooms). You could run it all from your computer, but the more convenient way would be to get one controller and 3 receivers. The receivers each have a different name and you can select and control the different zones all from one remote. I've had no issues with dropouts or network traffic associated with the squeezebox. The vortex box has several advantages: quiet & low power (25w) 4 onboad audio outputs preconfigured to rip your disks (insert disk, rips to flac and mp3, gets tag info, download cover art from net, all hands free). If you are computer savy, cou can D/L the vortex box OS for free (its open source) and put it on an existing machine. For me it's the low power element that sells the vortex box. My server right now has a 200w power supply, so the vortex will cut my musical carbon footprint by 8 times. Also the auto rip is cool, as I've strugled with getting a similar setup to work on my own server. Hope this helps. (If you get confused just listen to the music play)