I don't know if I am understanding all the conversation but what I can say is that I faced problems when I export to bitmap that has text inside and text is not placed exactly in a pixel, when I see that bitmap on screen text looks blur then I have to reposition text to a rounded pixel to get a perfect representation on the screen, if I have a choice that everything I place where placed over whole pixels will be very in handy.
I am not an expert and maybe I am doing something wrong or not but that is what I repeteadly face.
According borders, again, may be We are talking about the same issue but every time I clip objects you can see a border around the clipping.
best regards.