Though obviously others will have a much better idea of this than me, I would agree that chorus is a nice addition to synthy combos. It thickens things up and can add an ominous, atmospheric tone to things which would work well for dnb stuff.
Here's a clip I did adding chorus (and delay) to a synth sound:
http://www.sonicaether.com/newsongs/mystery.mp3
And here are the three effects (synth, chorus, delay) played separately:
http://www.sonicaether.com/newsongs/mystery2.mp3
That said, I know John Davis said once that he used a flanger with extreme settings for approximating Reese bass sounds.
I think if I was doing dnb stuff I would strongly consider something like the Eventide Modfactor or Line 6 M9 to get a full range of modulation with lots of tweakability. And the digital sound (more so on the M9) wouldn't be at all out of place.
Just a thought.