I am glad that you are talking about the Olympus E cameras. I have been a OM user through thick and thin the past 30 years, I tried Nikon but went back to Om, then Leica R and back to OM again. I have Leica rangefinders but I am interested in a dslr for 'action' and wildlife.
Talking to my local dealer, having said that my Leica R was now gone I said that I was interested in a Olympus dslr as I had read that they were showerproof, even though he stocks Olympus he suggested Canon 7d with a 100mm-400mm to start. I have looked this system up and it is very popular but the lens was really too big for me and I see that Canon lenses just get bigger and bigger!
My heart lies with Olympus and I would be very grateful if I could hear your ideas, on other forums it is nearly all Nikon v Canon and Olympus hardly gets a mention.
Regards
Rupert