Thanks for the advice teloy. I run Logic 7 on a Pre-Intel Mac G5 with 2GB of RAM. When I bought the Mac I made a conscious decision only to install the music software I needed, so it's a pretty pared-down system and actually I don't use any third party instruments inside Logic - they're all installed on my PC. Nevertheless, the G5 regularly freezes for a short period and Logic will occasionally stop outputting MIDI for no apparent reason. Logic also crashes from time to time (although to be fair, that generally happens when I'm programming, not during playback.)
For those reasons, I don't feel a computer on stage is the way to go.
@teloy said:
receptor, which is slowly running out of business these days
Why do you think that is? It seems like a good idea to me, I can't understand the obstacles to running VI on Receptor.