Why it's not worth buying Nikon D7100 ...
... for someone who already owns a Nikon D7000. Nikon announced last week it's new DSLR, Nikon D7100; and if you're a Nikon shooter, then this information probably doesn't come as a surprise from me now. Before the announcement, I was quite curious what D7100 will be like, most probably because I was considering buying it. I shoot cropped-sensor DX - I currently mainly use Nikon D7000, so I saw upgrading to D7100 as a natural step. However, I quickly changed my mind - I most likely won't upgrade to Nikon D7100 and here is why.
I don't want to start a war here but I don't see much of a change and upgrades between D7000 and D7100. Ok, it has a bigger sensor (24 vs 16 megapixels), bigger back monitor size (so crucial! - yes, it's sarcasm ;) ) and better movie recording. The only thing that I could see any sense in getting D7100 is that its high ISO performance is improved over D7000.
However, for me personally, it doesn't make sense in investing extra money only for slight improvement in high ISO (even though d7100 is cheaper than D7000). I have to admit that I was never in the camp of those who want 'the best & the most recent' camera. Of course, like every photographer, I'm enthusiastic about gear but I like to distinguish between what is new & cool and what I really need.
Having said that, I don't really see a need for getting D7100, especially that's I'm really happy with D7000. I might get however next update, like D7200 though. :)
That doesn't mean that my photography gear's wish list is not long. In fact, it's much longer than I can afford unfortunately. I guess I'm more of a 'light guy'. I prefer to invest in light modifiers, softboxes, strobes, upgrade wireless flash triggers, etc. Just image what lighting goodies I can get for the value of a D7100 :)