I'm all for IQ but I think something like a 17-70 range would have been really nice for an F4 "standard" lens to be an alternative to those who have a 24-105 already. I mean, isn't that what the 24-105 was all about to begin with? The standard lens with the most focal lengths. 17-70 would have been great, even for crop cameras! I wouldn't have minded the extra weight and the slow speed but I disagree with overlapping this lens over the 24-105 instead of diversifying the focal range. The 24-105 is already acceptable in the weight department compared to other L lenses... Just my two cents. But, the damage is done already. One thing I did wanted fixed on the 24-105 was the distortion on the wide end, and if they fixed that with the new 24-70 lenses then I can only see more reason to try one out or even buy one after seeing enough good sample shots and good reviews.