On a crop sensor...EF17-40L or EFS15-85?

[dgatwood]

Why not consider the 24-105mm? It doesn't cost all that much more (check Amazon used or LensAuthority), has constant f4 aperature, is L glass, has IS, and has longer reach. I used to have a 17-55 f2.8 on my T2i, but I found myself not using the wide end and wanted more reach. The 24-105 got me there.

Must have to do with the sorts of things you photograph. A third of the photographs I've taken on a crop body are at a shorter focal length than 24mm. If you're considering the 24-105, I'd suggest pairing it with an EF-S 10-22.

For a general walking-around lens, I'd definitely pick the 15-85 on a crop body without hesitation.

 

[Patrick]

That is the closest to a consesus I've ever seen on the Canon Runors forum! Thanks to all who gave me their input, the 15-85 will be it. The 50 f1.8 will be faster in low light and the 70-200 will have the required reach for my needs.
Thanks again.
Patrick