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Ah, that's two out of three! If Shouryu posts as predicted, I'll win the trifecta !
Viola, I use Finale, because I've used it for the better part of 15 years, and I know the Speedy Notation system without looking; I can almost notate as quickly as I can type. When it comes to getting the notes on the page, I almost never touch the mouse, I just go go go with the keyboard. (I've never bought a MIDI controller because I'm cheap.) I'm sure there are other notation programs that are plenty fast, but I've messed with a few (Sibelius and...man, I can't remember the other one), and just the time it would take to learn the new input system would take me longer and slow me down. *shrug*