Don, smooth pun there ;-)
Craig, wow I'm surprised at how slow those shutter speeds are. Do you find ISO1600 to be much cleaner than ISO3200? because which such slow shutter speeds being made possible in that level of darkness, it looks like the GRD4's IS willl be a very helpful feature in keeping the ISO down indeed.
Looks like the GRD4 moves up of my list above the 3 for now.