Thanks awin. I think I phrased this question incorrectly. I guess the question really is, is the 24 105 a good lens for a wedding photographer or should I save up the money for the 24 70 (partially be selling the 24 105)?
I am a wedding photographer, and I have a two-part kit for events.
17-40 f/4L USM
24-105 f/4L IS USM
70-200 f/2.8L IS USM II
This is an excellent general purpose combo.
I frequently find myself at receptions where the room is really dark. Even worse, it's become trendy to paint the ceiling black, so bounce flash is just about useless. One stop in my core zoom lens isn't going to help me a whole lot here, really. So for those situations, I have my fast fixed lens kit:
24mm f/1.4L II
I find this setup to be much more flexible and usable in even the darkest venues. While an f/2.8 zoom is a very nice lens to have, in the dark places I shoot, it's just not fast enough. In places where it is, f/4 is usually just as good, especially when it has IS.