Pianocade
Combine the joy of making music with the nostalgia of a classic arcade machine with Pianocade ($250-$325). This powerful synthesizer is designed to sound, look, and feel like a vintage arcade game, offering a 128-note range, 5-pin and USB MIDI connectors, and either one or two octaves worth of buttons. Feel like customizing your own? You can buy the electronics by themselves for $100.