Which would you get first and why? I've used the 10-22 for about 5 minutes while on a friends 30d, not nearly enough time to decide if I like it or not but I know that 10-22 is pretty freaken wide. 17-40L = for the fact that it's an L lens so I expect many people to vote 17-40 just for that fact but it's not as wide as the 10-22. also f/3.8 > f/4 though not much of a difference. but I think the 17-40 might be nicer because it has a wider range. also aren't the prices about the same for these lenses?