I may have an opportunity to hike the Inca Trail in May. I am currently debating what equipment to bring. I want to trim down my gear, because I carried way too much stuff recently while in Costa Rica. I currently own an F100, 24-85 AFS G, 80-200/2.8, 35/1.4, 105/2.5, Tamron 90 macro. I love the 24-85 since it is small and has matrix metering; however, the barrel distortion at the wide end makes it impossible to take landscapes with the horizon. (I learned this the hard way after hiking the Grand Canyon last year). The 80-200/2.8 is too heavy. I will probably pick either the 105 or the 90 macro but not both. I love my 35/1.4. Do I need something on the wider end? I am considering purchasing the 17-35/2.8. I wanted to hold off on buying this, since I am getting the digital itch and am not sure which wide angle to purchase. What I am asking, then, is what recommendations anybody might have for lens selection for this particular trip.