So I just purchased a used D700 for a bargain price to enter into the brave (& expensive world!) of FX, after starting with a D7000 a few years ago. I now have 7 nice lenses too (a lot of NAS going on!), 4 are FX, 3 are DX. The DX ones are 10-24mm, 17-55mm & 55-300mm.
I'm interested in what others have done in my situation in making the decision whether to sell all their DX gear, or keep it for the 'reach' or affordable 'wide' that it offers?