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You need to ask yourself: is there anything important missing in the D7000 (I mean for your shooting requirements)? For all I heard it is a fantastic camera and if you get one now you can start right away. You never know how long it will be until you can really get your hands on the replacement and if everything works fine from the start (see focus issue with D800 and dust/oil with the D600).
@Chicagrafo - you missed one major differnce between the D5100 and the D7000. The D7000 has a focus motor in the body which allow you to use older, non-AF-S lenses. That is a major deal to a lot of folks. Also, the variangle screen is only usefull if you use liveview, which a lot of us don't use.
If you want somthing signigficantly better than the D7000 then by a D800 somthing betwwen the two get the D600 what will happend next year
Saint Peter don't you call me 'cause I can't go
Perhaps you should take a drop more water with that seven? :-))
The guys above say most of it really, but:Well, I have the D7000 and what was good high ISO performance at the time has now, in the face of the D4, D800, D600, D5200 and D3200 been demoted to <meh> status! That's life, but you have to remember that the D7000's performance doesn't diminish when the D7200 comes out. My strong advice is take advantage of the RIPPING deals that are around at the moment. I can't see it going down much more.For me, I always try to shoot at the lowest ISO possible and I really mean try - it is fairly rare for me to go to ISO 400 let alone faster - so a newer better ISO performing camera doesn't appeal.You have not told us what kind of photography you do? At the end of the day, that is the single most important question! If you do any kind of high speed action photography (sport or wildlife), wait for the replacement. If it is landscapes and portraits, get the D7000.
Any camera would suck if the person behind it doesn't know what they are doing. Like people with D3s's that use them in P mode.