Another thing to keep in mind is that the Tiptop Fold has a suboctave divider; you can get up to four octaves down from your initial pitch with that. That would kind of disqualify the DixieII+, since you'd be duplicating a function with it that's better-implemented in the Fold. Instead, try and aim for adding more modulation possibilities with the VCO choices while maintaining cost-effectiveness. That Doepfer A-110-6, for example, is $21 more than the DixieII+...but it gives you quadrature outputs both as a VCO and LFO, has thru-zero FM capability, plus both linear and exponential FM. This makes it useful as a modulation source in LFO mode, and as an audio VCO with some very strange FM capabilities. Sounds like something worth $21 to me!