I can second the G5.
I upgraded my wifes digicam from the S100 to a G5 and have never looked back.
She still uses the pocketcam S100 for 'on the move' shots but for anything that has the slightest bit of composition then she uses the G5 every time.
I don't bother with the S100 at all now. The G5 is flexible enough to get pretty much everything.