now the comparison between the 17-55 and the 19-35mm is a little bit different. Here we can clearly see differences between these two lenses.

The Nikon is definitely superior at F/3.5 and F/4.5 since the Tokina is very soft at this apertures. But since the focal length are used for landscape pictures anyway, well it doesn't really matter. And you also don't really use this for potraits. Well you use 35mm for potraits, but for this I would just order a Nikon 35mm F/2 or Sigma F/1.4 which cost less than 300$ these days.

But once you hit F/8 the lenses are pretty much equal again and the tokina holds it's stand very well and even seems to have better CA values. Once you hit F/11 both lenses start to get soft again, thanks to difraction, but the Tokina seems to be a touch faster.

Well the message is clear. Return the 17-55mm, buy a 35mm F/2, which can be used on full frame in the future and put the rest of the money towards your saving account for a nice trip.

I could test my sigma 10-20 now against it, but this is getting pretty pointless after I already know that I return it.