There was a recent thread in which we discussed noise, and it got me to thinking: the only time I've tried to use higher ISO with the D7000 is when the light was low. I've found that ISO 1250 is largely unacceptable (to me) in low light for wildlife or portraits of animals. Fur & feather textures get lost in running noise reduction in post.
Here's a shot at ISO 1250, in bright sunlight, of a bird. It's cropped pretty deep: from the native file size (4928 x 3264) to 1147 x 759. Post work done in Topaz Labs suite, including Denoise and Detail, but honestly - it was not that terrible, and LR would have been sufficient.
Anyhow, this is perfectly acceptable (to me). If I didn't have such a deep crop, I'd have an image that I think would print nicely at a reasonable poster size. I think the D7000 acquitted itself quite nicely.