I like taking landscape shots. I like using as wide a lens as I can. My lens of choice is the 17-40 L. I typically stop it down, since the large majority of the time, it's in decent light.

I also shoot in lower light, and will use bracketing to eventually do HDR.

While the 11-24 seems like a nice lens, it's a lot of dough to achieve a few more mm of angle.

A much simpler solution is to take two shots, blend them into a pano.

Even realtors or architectural types do editing of their photos, so it's not a big deal to use a stitching program to get an even wider angle.

If one is going to spend 3 grand on a lens, it seems a better deal to buy the 17-14 or the 16-35 and put the extra cash toward more lenses or a camera body, to expand the kit.

Just my 2 cents.