Frank....... hardware arrangers are the only way to go live. I'm sure you're having a ball with your softsynth setup, but there is nothing about it that's easier than using a dedictaed arranger.
No one ever requested me to use a higher quality sample either. Actually, I've played many, many successful jobs on inferior pianos or old electronic rigs.
I applaude your "pioneer" attitude with the pc stuff, but on stage - I need buttons and hardware !