.

The same company that makes Power Tracks also makes Band in a box. Both are astonishingly simple adn fast for the kind of notation you are talking about. You can get both for under 100US.

I prefer Band in a Box for these tasks because it actually is a leadsheet based program. When you press play before you print, you can actually hear the program perform a leadsheet arrangement as you wrote it.

Programs like Sibelius and MidiNote are good, and have a great many features that will not help to create lead sheets. I find that these features get in the way.

.