Crutch For Amateur Vocalist, Hardware and software to learn music Options

[fleason]

I've got an iMac with a Gig of memory, USB, Firewire, etc. I sing in a Church choir and need help learning my part. My piano skills are worse than my sight reading skills. Yet, I need to learn and rehearse Mozart, Bach, etc.

I was hoping to find some software and hardware (keyboard) that I can either enter the score (via an editor) or play the score and adjjust tempo. Once this is entered, I need to sing the words over and over. Eventually it would be nice to add the accompanimnet. In a perfect world, it would be great if I can download the music, but entering the score is fine and being able to scan the score would be great.

I've seen some stand-alone keyboards with a little lcd display that almost solves the problem. (Display staff and notes) But I still need help getting rythm correct.

Any suggestions?