Which lense will better with nikon d7000?

Sigma 17-70mm f/2.8 or tamron 17-50mm f/2.8: if you forget about the fact that sigma has slightly higher zoom then which lens will be better to buy?

Lens ranking in my view:

1. Nikon
2. Tokina
3. Sigma
4, Tamron

The first person's answer has its right. Nikon would be the best, Tokina in second. Sigma would be in third and Tamron in last.

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Oh, I forgot!

Why not from these instead? Schneider, Voigtlander and Zeiss.

Yes, Nikon is a good lense.

I agree with the rankings above in VERY general terms, but that doesn't mean that Sigma and Tamron lenses are no good!
Top end Sigma and Tamron lenses are better than bottom end Nikon or Canon lenses.

Of those 2, I would go Tamron