The Kurzweils K 2000/K 2500/K 2600 are great for this purpose.
You can even do your total soundtrack on them without the G3.
Fred
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Keyboards/Sound Units: Kurzweil 2600S, Roland VR-760, Acces Virus C, Roland G-800, Akai AX60, Minimoog, Machine Drum, Roland R8-M, mediastation x-76