I have been reading this post with interest. I posted a similar question regarding if it's worth it to go from DX to FX.
I get that it's really the photographer that makes the image and not the gear.
I do shoot RAW. I have been experimenting with HDR lately to help me with dynamic range. One short fall I notice is that when using HDR for landscape there can be significant movement in the foliage on my slower frames and my final HDR image does not appear as sharp as I would like. If I push a single frame too much I notice certain quailty issues with noise and color edge defringement (? I may have made that word up) I use Nik's HDR pro 2. I can improve results with photoshop and Luminance masking which works better, ( sharper image with a more realistic look), but is too time intensive for me with my current skills.
If the camera had better dynamic range than the D7000 I may be able to use a single RAW image more fully.
I understand the jpeg out of the camera may not look too different printing sizes up to 11 x15 inches on either camera.
Will my processing abilities and especially my ability to maximize dynamic range be noticeably improved with the D600?
"Cameras and lenses are simply tools to place our unique vision on film. Concentrate on equipment and you'll take technically good photographs. Concentrate on seeing the light's magic colors and your images will stir the soul." Jack Dykinga