I already have the 24-105 and totaly love it. I wanted to get a faster lens for concerts but didnt wanted to get rid of the 24-105. As now, I got some money back, so i bought the 16-35 mk1 online, waiting for it now!
Well, i wanted to ask for opinions and I wanted to brag abit also
Ive got the 85mm, but in clubs where i shoot, i need the wide angle. Most shots are 17-50mm max! For bigger events, like open airs i got the 85 f1,8 and the sigma 50-150 .. works for me.
I have both the 24-105 and the 16-35... love them both. The 24-105 gets a lot more use as it's a great walkaround lens, but the 16-35 really shines in low light conditions.