not so exotic, but...

i think a "big" mixer will be nice..about 16 channels, or a 4x4
mixer...

i would also like a joystick module, maybe with a tabletop-mount
option...

and also, a module with 4 or 8 inputs for electronic percussion pads,
(like the yamahas DTX or the roland V-Drums pads). I use a SP-5 pad,
inserted into the gate IN of the A140, but I think this is not a
dynamic input...