Sibelius comes with a bog-sandard music OCR scanner, and is very expensive; there's also a high-quality music scanner, and that's very expensive too. Unless you're a pro musiscian or music teacher (or very wealthy) I'd go for SharpEye and something like Noteeworthy. You canget a time-limited demo of Sibelius, and it is very good: worth a look if you can afford it.

Steve