Roland Boutique Synthesizers & Drum Machines
The Roland Boutique series is awesome! These are small synths and drum machines with major sound. Each is modeled on one of Roland's classic instruments, except for the SE-02 which is a fully analog collaboration with Studio Electronics. Select from the sublime polysynth JU-06A modeled after the classic Juno-60 and Juno-106, the SH-01a which is modeled after the SH-101 monosynth, the 3-oscillator analog monster SE-02, the TB-03 (which probably needs no introduction), and TR-08 which was modeled after the drum machine that started it all, the TR-808.
All Boutiques have MIDI and USB, so you can decide whether to use them like classic synthesizers using traditional MIDI and audio outputs, or you can use MIDI as well as audio over USB. They're battery powered or USB bus powered (except the SE-02 which includes an AC adapter), making them great travel instruments. And each unit includes a "mix in" that allows you to chain the audio of them together into one output for headphones or for your mixer.
Grab a DK-01 dock for your Boutique, which cradles the unit in three different orientations, or go straight for the K-25m keyboard which attaches to any Boutique for instant playability (also with three angles). The TB-03 and TR-08 come with their own dock already.