I've been debating this for some time now: whether to upgrade my d600 to a d750 or drop Nikon and go all Sony a7. Then...I was gifted the a7 yesterday. My gut is still telling me to go Nikon as that's the platform I'm invested in and I've been eyeing that 750 and 20mm 1.8 since they were announced. I do a lot of travel/landscape photography so I really wanted to be able to update media via wifi/iphone on the go. Either can do that. I just think dedicating myself to one platform is the better choice as I don't do quite enough commercially to justify both. The Sony will always be the more versatile option, but I know I'll produce more high-end content with Nikon and my current lenses. Anyone have any thoughts on this? I may be easily swayed, but I'm nearly set on returning Sony for the 750 and 20mm 1.8G.