In the line of CD-100 ...
And more feedback delay : http://www.u-he.com/mfm/images/mfmscreen.jpg
I have in mind also the multicomb, the pipe of Absynth, Enigma from Waves ...
Also 3 / 6 taps, each with his own feedback and amount, panning, lot of LFOs, envelope follower, filters ... etc
