My 6 recommended vintage synths are: 1. Yamaha DX7 2. Roland D-50 3. Roland Alpha Juno-2 4. Kawai K3 5. Yamaha Electone Organ models 605, D-65 or D-85 6. Commodore 64 (I accidentally say this is a 4-voice, when it has 3 voices. It has 4 waveforms in the oscillator though.)