I'm torn here. Later on I will buy more lenses, so sticking to one brand is pretty much required. I don't want to have 2-3 hoods, 2-3 of this and 2-3 of that.
I'm down to 3 right now, of course 1 of each brand
Canon EF-S 17-85/4,0-5,6 IS USM
Sigma EX 24-70/2,8 DG Macro (it's heavy and large to the point that it blocks the flash according to some tests)
Tamron AF SP 28-75/2,8 XR Di LD (Sorry Aaron, had to put it on the list since people are saying that it's better than the Sigma)
I've pretty much ruled out IS as a main factor to choose lens from. But if it has it, it's a bonus.
I would like to stick to all Canon, since they have other lenses that I will most likely get later on.
The Sigma and Tamron are both 2.8 and I really like playing with depths in pictures.
But I could get the Canon 17-85 f/4-5.6 and use a 50 f/1.8 for those moments instead, if the Canon is that much better and for the sake of sticking to one lens maker.
What's your thoughts?