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Hi abstractrhythms. I'm a huge Drexciya fan too.
I really like the organ mode in Rings. You can get really close to the sound of "A Forest" by The Cure and that early post-punk vibe. You may be able to pull off some of the Drexciya polyphonic chord sounds with Plaits in chord mode or the Music Thing Modular Chord Organ firmware on their Radio Music module, but really it would probably be a good idea to invest in an external polyphonic synth to get better control over chords. If I remember correctly, Drexciya supposedly used a lot of Roland and Yamaha FM synths. You might be able to get close with something inexpensive like a Roland JV1010 and midi controller...
Mylarmelodies had a cool video about using sample and hold modules combined with chord modules to get "chords" that follow the melody of your song in a sort of Drexciya-inspired way. Take a look on YouTube for that.
I have really enjoyed using the Behringer RD8 for my 808 sequencing and sounds (all due criticism of Behringer aside).
Have fun and good luck!