I pulled the trigger on a refurbished E-M1 after some real deliberation on the merits of the Fuji X-Trans versus mu4/3. I went with the Oly but now I need more than the two lenses I've picked up for my GX7. I'm thinking that a 12-40 zoom would be good for me since I tend to shoot a lot of things (portraits, weddings, sports mainly) so autofocus and high ISO performance are very important to me. But the extra reach of the 4/3 12-60 seems like it might be even better for me but my only concern is whether the 12-60's autofocus will not be as fast as a native mu4/3 12-40. Anyone have experience with these lenses?