Simon,

Many thanks for your highly informative answers. It sounds like setting up the speakers (as monitors) will be easier than I had initally suspected, though 17 lb (12.5 kg) subwoofers are a bit heavier to drag along than I would have perfered. I assume that you can't substitute another (lighter weight) brand sub woofer, yet still use the Tyros satellite speakers, right?

You say that the subwoofer sits directly on the floor. I guess the pictures I've seen of the TyrosL
http://yamaha.com/cgi-win/webcgi.exe/DsplyModel/?gPPK00005TYROS

gave me the false impression the subwoofer was attached to the Tyros stand (seeming to appear above the floor), so I'm GLAD to hear that this is NOT the case.

Thanks again,

Scott