Never thought I would solicit this kind of advice but I am stumped. I just sold my 24-105 because I felt the f/4 was a bit slow for weddings. I've rented the 16-35 and 24-70 before and liked them both. I can only afford one. I also own a Sigma 50 1.4 and 70-200L. I have a 5Dii and 40D. If I get the 16-35 that will cover all the range I will ever need but at the expense of having one covenient zoom. Is it that incovenient not having a standard zoom? Thanks for all your input.