The Electribe is a fun little box... not too awesome soundwise. Easy to program, but no pattern-writes during playback (nasty!).
With some tweakage the 4 synth parts can be really fun, though. Had some troubles doing full L/R separation of drums, which was a shame, as that would have equalled two discrete (mono) outs.
Only MIDI controllable by note-on/off's and NRPN's, which sucks when using Ableton Live.
Heard some good stuff about the RM1x, seems a better option, but at least 2x as expensive. The MD is supposed to be kick ass, as well, but costs loads of hard cash.
Good luck!
-diskonext