I'm late to the party, but based on my experience (over 30 years with Nikon & Olympus 35mm, Pentax 67, extensive 4x5, Olympus E-1 to E-30, now Nikon D800E) skip the Sony an go straight to a D800. It won't disappoint! It's like having 4x5 IQ in a system I can canoe and backpack around. I am not using the expensive wonder-lenses (e.g. 24/1.4), only D lenses and the IQ is still there.