I'm on the verge of upgrading my Nikon D3100 to a D7000. I am an amateur but enthusiastic photographer who will have a go at anything (sports, portraits, landscapes, etc etc). I'm across the technical differences and can't see me ever needing anything beyond a D7000. I'm also aware that the D7100 is emerging, but can't see any benefit for me for what it brings beyond the D7000. So for those of you who know what you are talking about, is this a good move?