I don't use a notation software at all. I write it out by hand, and then sequence it in using VSL. I love writing out music, and I have terrible handwriting, too. Take a look at this:
Staatsbibliothek zu Berlin: Beethoven Digital
Beethoven's handwriting wasn't the best, either. If I were going to have an orchestra play it, than I would put it into Finale or something. But the compositional process, for me, must be done by hand.
Colin Thomson