SD90 for sure. I had the early and later MidJays and SD40. The SD90 wins overall in real time control, outstanding sounds/styles realism, extensive, deep features and of course it's portability.
For controllers, I'm using Korg Microkey 61 for travelling and Nektar GX61 for local performances.
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Jim
SD90,Korg I3, KMA Liverpool,TC Helicon Play Electric, Fender Sonoran Guitar, vArranger, Bose S1 Pros, Bose L1 Compact, Aiwa Exos-9