The 70-200 II is an absolutely amazing lens. The range and f/2.8 on it is simple awesome to have, and coupled with a telephoto extender, it provides an even wider ranger of possible usages. All three lenses, though (100, 135, 70-200), are amazing lenses with multiple ways to use them.
The 16-35 definitely covers a wider range of focal lengths, which is useful for certain purposes, but the 14-24 is theoretically better in every aspect except for the focal length in the long-range. Here's the main question: would a photographer get the 14-24 for the wider focal length and better performance, or would a photographer get the 16-35 for the versatility in focal length? I'd definitely pick the 14-24. Any day. It just offers so much more!
Going with the 17-40 would be a great choice. It's a good lens to have when you upgrade to FF, and it performs quite nicely. Its build is quite solid, and it's water/dust resistant. Plus, it takes 77mm filters, which is what many lenses take! Hope this helps