YAY! i had a Roland D-5... wish i'd never gotten rid of... long story.
anyway. if you can get hold of one, the Datel Midimaster is your ticket to midi magic.
octamed soundstudio is pretty damn good.
music-X is good if you have the time to spend with it.
i had bars and pipes, but never made anything good with it. too complicated. but a professional bit of kit anyway.