At least in Sibelius, you load the full version of Kontakt as a VST and Sibelius acts as a midi player piano that triggers the sounds in Kontakt. Not quite, and I'm not sure if finale works the same as Sibelius. Is this basically using the Kontact Player for audio playback instead of VST? Everything in kontakt will sound better than garritan. So you can use the free orchestra sound libraries that are out there, or go crazy with Vienna instruments. I believe all the new notation softwares support Kontakt.
