I'm about to pop for a new laptop and USB interface, and want to be able to play Reason synths live with MIDI. A 2.8GHz Pentium 4 is plenty fast but runs hot and has a short battery life (1.5 hrs or so). A 1.7 GHz Pentium M is about as fast for business apps, runs cooler and claims 3-5hr battery. But I'm worried about how Reason will run on it, particularly since it can slow down to under 1 GHz when running on battery. Anyone have experience running on a Pentium M (aka Centrino)? Thanks!