You can pick up a GH2 for around $700 new right now. It's a fine camera for stills and video, and you may appreciate the large grip. I have the Gh2, the GF1, and the original G1 with various prime and zoom lenses, and all are still in use. The OMD gets nice reviews and is only $300 more expensive, but I haven't owned any of the Olympus m4/3 so can't comment. However the in-body stabilization would be huge.
Here are some links on possibly helpful reviews of lenses: link 1
, link 2
You can pick up the Panny 14/2.5 cheap on eBay, and it's a fine little lens (and I do mean little.) The Panasonic 20 is very good, though I still want the 25/1.4. For a portrait lens, the Olympus 45/1.8 is really very nice. And yeah, I want the 75/1.8 though I can't possibly justify it. The 45-200 zoom is inexpensive but surprisingly decent - I often stick it in my travel bag just in case, and have made some nice images with it. If you want a mid-range zoom, the original Panny 14-45 is much better than the newer 14-42, though of course the 12-35/2.8 is likely better than both.