Sibelius is the best
Sibelius lets me produce sheet music arrangements efficiently, and has all the features I need for my work. After 20 years of working with notation programs, I switched from another program in 2008, and have not gone back. I'm more productive because more work gets done in an hour, and since Sibelius is easier to use, I can work more hours per day and remain fresh. Unlike some popular non-music programs, when Sibelius guesses what I probably want to do and pushes me in that direction, they almost always guess right. My main request is that Avid should be easier to reach on the phone, and it should be easier to determine eligibility for academic pricing. This is why I buy from Sweetwater, because you get another tech support option.