Descions Descions man I hate this.

OK so I have about $650 to spend,so I think i'll either go for the 17-40L,or the 100 2.8 macro.Any help making this desiscion would be greatly appreciated.

Dump the 28-105 and get the 17-40mm you got a 50 to cover mid rang and the nice 70-200 2.8 to cover the rest

Do you want to shoot Macro's and portraits or shoot wide more? That should make your decision. They are both excellent lens.

They are 2 completely different lenses.

One is for landscapes and doubles as a short walk around lens, the other is for macro (although it could be used as a telephoto).

If you need a short walkaround lens, and shoot landscapes often, then get the 17-40L, if you need a macro lens, then get the macro lens.