Tootler mentioned Noteworthy, above.

I use Noteworthy Composer to work up music for church and to play with friends, but it doesn't have a way to save to pdf.

A friend of mine has Finale, and her manuscripts are crisper and more professional-looking, somehow.

So, although I am a fan of Noteworthy, I don't think it would serve the needs of a serious composer whose work will be going commercial.