That's cool. I really just wanted to bring an option to your attention, since they are identical (except for the logo on the unit and the remote graphics...try zooming in on the Audio Tornado to get a closer look).
You might want to do a search to address your other questions. I've seen many posts asking the same questions about the SBLive 5.1 and the Promedia 5.1's.
Peace,
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L I N K