I looked really really hard at the OM-D - in the end I got a great deal on the Panny GH-2 + 12-35/2.8 OIS.
The OMD just was too fussy to use to change anything and I would have needed to get the grip to make it holdable (for even more $$). Also, I would have gotten the 12-35/2.8 anyways as it's the only quality m43 zoom that starts at 12mm (24mm FX equiv.).
Yes the IQ of the GH-2 will be two years dated, but it's still way better than any small sensor point and shoot and it ticks just about all the critical things for me: Built-in flash, lots of external controls, flip out/hideable screen, great viewfinder, and perhaps most importantly a true 16:9-capable sensor. It can also use all that great Oly glass if needed even though it does not have IBIS.
That 75/1.8 is just amazing based on my test shots . . . . . not sure it's worth the cost, but it is amazing!
I shoot Nikon professionally and had an OMD with a set of primes, the Oly 12 & 45, and the Panasonic 20, as my travel/family camera. It was ok, nice and light, but I didnt feel it was worth the money for the IQ it delivered. I ended up selling it and picking up a Fuji XE1 and a set of their primes as my travel/family camera and am much more satisfied. Faster apertures, larger sensor, more reasonably priced lenses, etc.