Upload & Sell: Off
I will buy D600, is it comfortable to use the zeiss glass?
D600 is still rumorware, so can't tell you with any surety. However, if it is FX and has the same set up as the D800, then it should be fairly easy to MF. However, the Zeiss 85/1.4 suffers from focus shift and like I stated before, does not have a good bokeh for portrait length/distance photos. Couple that with the fact that it is difficult to MF with f/1.4 at 85mm, you probably will be disappointed with most of your images till you spend many weeks with that glass/camera combo.
either way, good luck with your choice and have fun.