2 possible trades for my Genesys Pro S: which would be better for me (assuming $$ are reasonably comparable)?

1. MidJay w/Roland Discover as controller.
2. SD1plus

assumptions: I don't need 76 keys but would prefer. I don't need semi-weighted, and am concerned that the tendinitis in my hands may flare up with a heavy action, as it does on acoustic piano, and to a lesser degree on Gem sk76 I used to have..but Gem is heavy action..some say sd1 has a light action. True? I use board mostly for live
performance, jazz on the fly with mostly just bass/drums,
my vocals, and ease of transpose, registers, tap tempo, etc etc is very important-are there negotiation problems in using controller/module vs. single ? I haven't yet used smf or other files but might be tempted to try
with the Discover, since that is supposed to be best for it..
I have never tried out any of these units, and am not
likely to find a place that demos them, so i have to go by
what people advise me and my own research..thanks
Miami Mo
ps..anyone who has similar or alternative trades, please
make proposal..neither of these trades are firm offers...