Upload & Sell: On
The Bob Atkins articles are great, I recommend anyone interested follow your link.
I've found I really like the 14-15mm range for landscapes, but not having a normal lens cover for the 8-15mm is problematic. The 17-40L shines in terms of practical usage, I just like wider.
The thing I like about the 8-15mm is the exta range over the 15mm, which for me is more useful than the extra f-stop. But I can't say I'm a fan of having to post-process every shot when I want rectilinear.
The build quality of the 8-14L is spectacular too. The 17-40L is great too, but I was more impressed with the fisheye build.
Torn, torn, torn...