If you weren't a newbie I would have suggested Nikon D800.. Nikon D7000 is unarguably a better camera than the ones you've mentioned, however if I were you, I'd go with D5100 just to get my feet wet, shoot with it for few years (believe me, for many newbies (including me), there is no difference in photo quality between D5100 and D7000) and then upgrade to full frame camera.

Invest on lenses if you can. So buy D5100 body only, and get a prime lens 50mm/1.4G. You'd thank me.