I would, and I have, but it really depends on the band.
If it were just me and a drummer, then I would probably prefer two keyboards. I would have one spit with a bass voise on the lower eys, then either a horn/string/pad sound for the higher keys. Then the primary board would probably be some piano/ rhodes sound. Or, if the keyboard has the capability and I had time to set it up, I would setup a performance one one keyboard with the sounds I want and split /layer setups.
If there was already a baass player, guitar player, horns section, or another keyboard player, then I wouldn't see a need for another board. Thats my take on it. Be Blessed!
p_music