Thanks guys for the answers
Here, in Italy, i can find the D7000 body (with Nikon warranty of 4 years) at about 850€ and the D7000+18-105 (Nikon warranty) at about 1030€.
The difference is approximately 180€, but the 18-105 alone costs 210€, not that much of a difference
Maybe with a plus of "only" 90€ it's better to focus on the Tamron 17-50 not VC (300€ approximately) losing 55mm of tele side, but getting a better lens (to match in a future with a Tamron 70-300 to cover the tele side) able to shoot at 35&50mm at f2.8 (with worst bookeh, i know) and let me learn what it means to shoot at fixed focal with decent results in the meantime.
What do you think?
Thanks.