I have been debating the Sigma 60 versus the Oly 45 and the 1 stop difference is the only reason I have not pulled the trigger on the 60. Now, I am thinking that the 60 is the answer if I also acquire the Oly 25. The 25 is a bit more versatile, imo, indoors versus the 45 and gives me that extra stop when I need it over the 60. So this would give me a kit that includes the 12, 25, 60, and 12-40, 12-50, and some misc. adapted lenses. That said, does this logic make sense? The gap between EFL of 50 and 120 could be filled by the zoom?! Opinions?