its unfortunate, but i started getting into playing live -after- i had a good sized collection of boards, so i tend to just stack them and have them set up before hand. i use wakeman-esque organ sound most of the time, so i can leave the xk-2 alone.

i use the same piano sound on the fp-2, so i can usually just elt that hang out.

on the Alesis Ion, you can have a setup called up that puts four different patches at the ready, each with its own soft button. you can layer them, or turn one off and bring another one up. thats super handy.

on the Ms2000, you have seomthing similiar with the patch selection buttons. but MIDI is probably the way to go overall. i would have done that if i had been thinking "live" from the beginning.