WAIT!!!!!!!!
Are you seriously advertising to write in a genre of music in which you have no experience OR prior knowledge? :facepalm:
You're going to need a VST library to run within the sequencer, such as EastWest or Kontakt. Those two cost a lot of money, so I would start off with Edirol Orchestral. That's what I use and, if you're really good with your sequencer, you can make it sound pretty snazzy. If you for some reason can't get your hands on a VST library, don't worry. You already have what you need. Live recording may seem pretty weak when compared to an orchestra, but for general "media" uses (which is way too broad a term for anyone to give any useful advice), it should get the job done.
Now let's just hope that no one calls...