Actually, the Dixie II+ is an excellent choice, it packs a lot of capability into that space. The only thing I might ding it for is cost, but considering the functionality jammed into it, you do get your money's worth. However, you might check and see if the Dixie II+ has the same backplane connectivity that the Dixie II has (see that module's listing for an explanation). If so, then I'd suggest running the Dixie II+ as a 'master VCO' for a Dixie II, sort of like the Moog 901 driver/oscillator arrangemen except that both can output signal since both are proper VCOs.