I will release a software synth this week, to go with vArranger.
Sound will be very basic in the beginning, but then I will improve the sounds.
The software will be able to load SoundFonts SF2 too. (For now this feature is locked)
By the way, any good GM/GS/XG synth is able to play tons of styles.
One of my user is using vArranger + Roland Integra 7 sound module.