DNJ, on the Northern Sound Source, Tascam and Native Instruments Forums there are a few entertainers moving towards Laptops with midi controller keyboards for their live performances. With a carefully tweaked Windows XP LT the reliability of these systems equals that of regular keyboards. The sound quality greatly exceeds that of any high end keyboards (workstations or arrangers). In any event, if people are spooked by the use of this approach you could always use a Tyros, Motif or Fantom as your controller keyboard and revert to these sounds, albeit at a lower quality, should your LT fail.