thanks for the help.
i think im going to stick to using the one speaker i have now. i bought a stand for it to get it off the ground and i can get away with it with lower volume and its still just about as loud, i didnt think it made that much of a difference being off the floor.
its ok to run pianos in mono when playing with a loud, dense band right? no one can really tell the difference can they? i mostly only use piano effects, a couple horns and some synth stuff. itd make carrying gear to shows alot easier.