also you could get an etherwave pro, 2 CP-251s and 3 MF-101s
plug as follows
theremin pitch CV out to 4-way multi of first cp 251
three outputs of 4-way multi into cutoff ins of each MF-101
theremin volume CV out to 4-way multi of second cp 251
three outputs of 4-way multi into mix ins of each MF-101
crank the resonance, detune the filters and you've got yourself something crazy, also you plug the theremin outs into the cp mixer before the multi, so you can add all the other goodies like S/H or noise modulation
or you could use the input mixer after the mulit so that only one filter channel gets mangled
this setup would cost a lot but it would be very cool! and you could use it for countless other things in different configurations!