I am not worried about the Panaleica DG lens quality at all. In my experience they are of exceptional "artistic" quality with sharp yet that difficult to define rendering, one of the characteristics of which is a smooth, buttery bokeh. In contrast the 300/F4 from Oly is sure to be exceptionally sharp, like the 60mm macro, a clinically sharp lens but perhaps without that same artistic drawing that the Panaleica is likely to offer. Of course all of this is pure conjecture and the actual hardware will determine the outcome. Meanwhile, we can but dream and thank our good fortune for such a huge variety of exceptional lenses available for m4/3rds!