Upload & Sell: On
I would appreciate input from the forum regarding a second body for an upcoming trip. I am scheduled to go on a photo tour for owls in Quebec/Ontario in January. This is a big trip for me, maybe once in a lifetime, and I would like it to turn out well. For bodies I currently own a 1D MIII and a 40D, for lenses I will be using both the 100-400 zoom and the 500 f4. I am wondering if the 40D is up to the task, especially for owls in flight. I see three options aside from taking the 40D, each with its own advantages:
Rent a 1D MIV for the week at about $400
Rent a 5D MIII for the week for about $250
Buy another 1D MIII, and sell it after I return
The 1D MIV is probably the camera most suited to the task, but the most expensive option. The 5D MIII is close in performance, less expensive, and probably my next body upgrade (I shoot more landscape than action). It is not weather-sealed however, and I am losing some reach. With both of these, I would be using a camera I am not familiar with for a big trip, which causes some concern. With the 1D MIIIís, I could buy one, use it for the trip, and sell it after I return. No way to know how much money I would lose in this option, my guess is around the price of the 5D MIII rental, but I would have a sealed body with better battery, and one I am familiar with.
Realizing that there is no absolute right answer, what would be the input of the forum? What would you do in my position?