Just upgraded to Sibelius 6 – I love it! A bunch of fixed, a lot faster, it does some very intelligent things with layout (like making sure your lyrics don’t overlap your stems and dynamics, grouping things together so that when one dynamic moves, the vertical position of all of them in the line move). I have yet to do a big score to parts project, but from what I’ve seen so far, it’s going to be great!
Anybody else using it? I’m waiting for the Sibelius / Protools integration to step up a bit more (graphic editing of midi data via score, for example), but when it does, I think APU will switch from Logic to that as our primary music platform.