congrats on your purchase! the Olympus is a fine camera..
but the thing i can't stand most about the m4/3 is that crop factor.. I'm coming from a FF world (5DI & II) and dropping down to a 1.5x on the Sony is bad enough.. a 2x would drive me nuts.. a 50mm becomes a 100mm telephoto on the m4/3, a wide 25mm becomes a 50mm standard.
I guess if you don't shoot wide angle stuff m4/3 is fine..