And yet again... sibelius is NOT the proper software to use sample libraries! Just because it can does not mean that it will produce decent even results. You don't have enough control in Sibelius to do a good audio work.
Sorry.
EDIT: BTW, the way I see it since 2000 or so, notation is fine and can produce excellent results. Finale and Sibelius, both are the professional software for notation and they are used for professional reasons! And they are not emulating real life, like samples do, so there is no real comparison.
