Hey Ian . . . As lawp says above - (I'm on Windows 7) and I've always used the Ctrl-TAB windows key command to toggle between Track View and Console View . . . works great, so I've never needed to buy that second monitor.
I prefer to leave my multidock (with "D" key command) for popping between soft synths, staff view and PRV view.
I think the trick is to have all the windows "half maximized" if that makes any sense ?
Wish I could figure out a screen shot here, but basically both Track View and Console View fill the whole screen, with the window control (top right) in the restore position.
Also, on my system Ctrl-F6 does the same thing.
Another option would be to use the Sonar screensets feature to toggle between.