I have tried the d800. The files are much larger in size and so is the camera. I think d600/D610 is a good buy for the price. If you like prime lens, you can start by 35mm f1.8fx or 50mm f1.8G. Not sure if they are gold ring but they perform like one. If you like zoom then 24-120f4 or even the kit 24-85mm vr would give good results. However like my earlier post, if you buying Second hand, Try to put a D lens and see if the AF motor works.. had couple of Nikon camera which refused to af with D lens Secondly try to use your lens wide open and camera to focus on someone’s face at a 45• degree with the centre point focusing one eye. Zoom in the pic and if you see other areas sharper than the eye you focused, then you have AF fine tune problems. Many people would say 1.8 or 1.4 have a thin DOF and that it’s user error but with Nikon I believe it’s the camera calibration.