These are both very different lenses. Remember on an FX body, the 17-35 is exactly that, a 17-35. On your d7000, the equivalent lens would be the 12-24. The 17-55dx lens corresponds more to a 28-85 type lens (in FX terms).
The 17-35 is a serious lens with a serious reputation from landscape photographers and photojournalists. It's tough, and it goes to war zones. I understand that this lens was discontinued several years ago, but so many pros complained and Nikon was forced to continue it (this may not be the case, I'm sure someone will correct me if it wrong!). It also costs a heck of a lot more than the 17-55!!
Personally, I can't really see how one can justify spending so much on a lens and then use it in such a way that the characteristics the lens has are not used, in this case the minimal distortion and low falloff on a full frame sensor. This is one of the reasons the lens is so expensive.
I would suggest you go for the 17-55, until you upgrade to ff. The 17-55 is a great lens with a great reputation, and you will be able to sell it on or trade it in for a good price when the time comes. If you need a wider lens then go for the 12-24, though this is constant f4, so a slower lens, but wider. The D7000 has great high ISO ability, so maybe just pushing the ISO a bit higher than normal could compensate.
Good luck with your decision. Both are great lenses whatever you decide.