Full frame anybody?

I just got the OMD and have the D800. Size of the D600 is not comparable to the OMD and the size of FF lenses are way way bigger than the M4/3 lenses. The 50mm to Nikon is quite small, otherwise I have felt all lenses where too big. I have the 24-120VR f4, and it's supposed to be the "street sweeper", but it really feels and looks a little to big for that I do love this lens and other Nikon lenses, but there is a reason for me investing in the M4/3 system. I'm looking to sell of all the Nikon I have, but need to see if there will be more 1.4 lenses and fast zoom for the M4/3 system.