Debating on the EF-S 17-55 f/2.8

[M_Six]

Thanks everyone. I think I'm going to rent it first. My concern is that it overlaps my 24-105L lens; I know that the lens is at F/4 vs F/2.8. I suppose I could use the 24-105 for outside stuff and the 17-55 for indoor photos only or portraits only.

I don't want to give up the 24-105 as I really like it for landscapes, etc.

I went to the UK this year with no 17-5x f2.8 lens. I had my 24-105, which worked for many situations, but I was really kicking myself for not buying or renting a wide-and-fast zoom. I was really missing such a lens when shooting inside cathedrals and such. First thing I did when I got back was buy a Tamron 17-50mm f2.8 (non-VC). I love it. If you have the money, get the Canon. If you don't think you'll miss the IS, get the Tamron for about half the price.