[LAU] Orchestra sequencing and synthesis

Hello everyone, it's the first time I send a message to this list. I would like to ask for suggestions for a project I'm about to start. For a musical I need to record some audio tracks of orchestral music (at least one, of about 50 sec.). Once I would have used Finale+GPO for this but now I will try the Linux way instead. The most important program I'm looking for is a sequencer able to handle notation (I never worked on piano roll) and able to control easily note velocity (to make the orchestra sound realistic). For this pourpose I evaluated Rosegarden and Musescore, what do you think about them? Is there something better out there? To get the orchestral instruments I was thinking to LinuxSampler (I already have all the sampled notes in wavs). Also here, do you think there could be a better approach? Many thanks. -- Asa Marco <marcoasa90(a)gmail.com> 朝