Finale (and other related products) This is the “industry standard” notation program (seems to have been a self-fulfilling prophecy 🙂 and lots of folks love it. I tried to love it, really I did. The price will make you look twice.
Personal Composer This is the notation program I have used since the days of DOS. Easy to learn, easy to use, does everything I want it to, great customer support, and the price is rational.