I've used Personal Composer since the days of Windows 3.1 and it's great. There is a freebie version on their website - http://www.personalcomposer.co.uk/notation/personal_composer_software/ (sorry, can't do blue clicky things!). It does all of what you want and more, is almost idiot-proof (I don't actually read music and I can cope with it), printed page is excellent. I also use Sharp-Eye which scans the printed dots and then plays them, and you can import into PersComp or just save the MIDI file. In fact, I use Sibelius at work and I prefer PersComp which is a fraction of the cost - around £100 or £160-ish with SharpEye. And their help and support is brilliant too.

If you want to have a look at what I've used it for, download their freebie and PM me and I'll e-mail you some stuff to look at/listen to.

Lady Nancy x