Yes the Dixie is very nice and since you already have the components vca, envelopes I think it would do better then the Doepfer voice. I was referring to oscillator sync, the Dixie would then take it's pitch from the sync input and as a carrier of the wave from the other oscillator it stays in that pitch while you modulate the carrier. Another idea would be to stick with the Doepfer but add Warps from Mutable instruments, there you have a carrier with through zero capabilities. Or use the A-110-4 from Doepfer as a carrier, it also has TZFM (through zero), A-110-6 would be even better along with the 111 as the modulator. Just some ideas, you may not like it :)