Rob,
At what distance and elevation do you view your A4 sized images? I have a bad habit of looking to closely at my images which only magnifies the blemishes caused by my shaky hands. My images viewed at a distance look so much better that I want to place a velvet rope around their display so that viewers have limited access. And then every so often I get a few shots that I want to just shove in the viewers face and say "there, how's that for sharpness".