Matthew, we just returned from Kashmir on Sunday. Really enjoyed the trip but learned a lot of lessons on what to do next time, maybe September .
I am still learning how to use the E-M5. A few problems were encountered: The battery did not like the cold, life took a big hit. The EVF takes too long to activate for quickdraw shots. I really like the Super Control Panel but it disappears when I change to some modes, have to figure that one out . If it had not been for the battery problem, and I only had one, I would have used it for many more shots. As it was, the D700, 70-200vrII got most of the time.
I really like the camera and it is a pleasure to use. I have big hands so using the command wheel on the rear takes some doing. The grip really helps me for size. My wife and son love the E-P3 and were constantly fighting over it. The 20 1.7 stayed on it most of the time. I used the Pany 14-45, 45 1.8, 12-50 and 40-150 most of the time. I really recommend taking some time to organize your lenses. I should have taken it slower. I wish I had bought the 7-14 instead of the 9-18 and I want the 25 1.4. I will be trying the 75-300 next month. My Pany 100-300 does get 600mm (???) but not over the moon with anything over 250mm on the lens(500mm). My son was getting better from his D5100,70-300vr.
Fortunately the new Pany 2.8 zooms will not be available to me for quite some time so I will see if they are worth the investment. I have pre-ordered the 75 1.8 .
For me there is no way that it replaces my Nikons for everything but it can for some shooting. My D800 purchase is on hold while waiting for my supplier.
We have just started PP on Kashmir shots and I have done a couple of E-M5/E-P3 shots but will wait for LR-4(this week) for the bulk. Cheers, Tom