Sibelius just released Sibelius 6, an upgrade that promises to cut your editing time in half. Their new magnetic layout will prevent symbols from running into each other; you can track changes, "conduct" your own music, sync your score with sequencers (Pro Tools, Logic, etc.), and supposedly the playback MIDI sounds are better.
Last night I downloaded the demo version, and I tested it out on one of my sketches. It already looks cleaner. I also discovered that there is a plugin where it can combine rests for you (if you copy and paste sections and have some hanging rests, this is a godsend), and you can paste sections "as Cue."
Not bad I say. If I upgrade, I will have to shell out some money. I suppose this option is less expensive than hiring your own scribe.