Roland VP-7 Vocal processor This must be easier than carrying/purchasing the keyboard versions!
Octapad SPD-30 Percussion pad Comes with 50 onboard kits and V-drum technology. Better than a regular controller, this looks interesting if it turns out to be a good price.
Roland VR-700 - Crazy performance / stage 76 keyboard with its own drawbars, synth sounds, piano, etc...full size "waterfall" keys.
Arturia The Player, The Factory, The Laboratory (via Gear Junkies) The coming-soon midi controllers. I like the color!